diff --git a/modules/billing/api/capture_order.php b/modules/billing/api/capture_order.php
index bd487658..accdc34a 100644
--- a/modules/billing/api/capture_order.php
+++ b/modules/billing/api/capture_order.php
@@ -11,12 +11,49 @@ ini_set('display_errors', '0');
 error_reporting(E_ALL);
 
 header('Content-Type: application/json');
-$in = json_decode(file_get_contents('php://input'), true) ?: [];
+
+// Read and parse input
+$rawInput = file_get_contents('php://input');
+capture_log('RAW_INPUT', substr($rawInput, 0, 1000));
+
+$in = json_decode($rawInput, true);
+if (json_last_error() !== JSON_ERROR_NONE) {
+    capture_log('JSON_DECODE_ERROR', [
+        'error' => json_last_error_msg(),
+        'raw_input_length' => strlen($rawInput),
+        'raw_input_preview' => substr($rawInput, 0, 500)
+    ]);
+    http_response_code(400);
+    echo json_encode(['error' => 'invalid_json', 'message' => json_last_error_msg(), 'request_id' => $requestId]);
+    exit;
+}
+
+if (!$in) {
+    $in = [];
+}
+
 $order_id = $in['order_id'] ?? null;
-if (!$order_id) { http_response_code(400); echo json_encode(['error'=>'missing order_id']); exit; }
+capture_log('PARSED_INPUT', ['order_id' => $order_id]);
+
+if (!$order_id) {
+    capture_log('MISSING_ORDER_ID', ['input' => $in]);
+    http_response_code(400);
+    echo json_encode(['error' => 'missing_order_id', 'request_id' => $requestId]);
+    exit;
+}
 
 $api = $sandbox ? 'https://api-m.sandbox.paypal.com' : 'https://api-m.paypal.com';
 
+capture_log('PAYPAL_API_CONFIG', [
+    'sandbox_mode' => $sandbox,
+    'api_base' => $api,
+    'has_client_id' => !empty($client_id),
+    'has_client_secret' => !empty($client_secret)
+]);
+
+// Step 1: Get OAuth token
+capture_log('OAUTH_REQUEST_START', ['endpoint' => "$api/v1/oauth2/token"]);
+
 $ch = curl_init("$api/v1/oauth2/token");
 curl_setopt_array($ch, [
   CURLOPT_RETURNTRANSFER => true,
@@ -27,9 +64,47 @@ curl_setopt_array($ch, [
 ]);
 $tok  = curl_exec($ch);
 $http = curl_getinfo($ch, CURLINFO_HTTP_CODE);
+$oauth_curl_errno = curl_errno($ch);
+$oauth_curl_error = curl_error($ch);
 curl_close($ch);
-if ($http !== 200) { http_response_code(500); echo json_encode(['error'=>'oauth_fail']); exit; }
+
+capture_log('OAUTH_RESPONSE', [
+    'http_code' => $http,
+    'curl_errno' => $oauth_curl_errno,
+    'curl_error' => $oauth_curl_error,
+    'response_length' => strlen($tok),
+    'response_preview' => substr($tok, 0, 200)
+]);
+
+if ($oauth_curl_errno !== 0) {
+    capture_log('OAUTH_CURL_ERROR', ['errno' => $oauth_curl_errno, 'error' => $oauth_curl_error]);
+    http_response_code(502);
+    echo json_encode(['error' => 'oauth_curl_fail', 'details' => $oauth_curl_error, 'request_id' => $requestId]);
+    exit;
+}
+
+if ($http !== 200) {
+    capture_log('OAUTH_HTTP_ERROR', ['http_code' => $http, 'response' => $tok]);
+    http_response_code(500);
+    echo json_encode(['error' => 'oauth_fail', 'http_code' => $http, 'request_id' => $requestId]);
+    exit;
+}
+
 $access = json_decode($tok, true)['access_token'] ?? null;
+if (!$access) {
+    capture_log('OAUTH_NO_TOKEN', ['response' => $tok]);
+    http_response_code(500);
+    echo json_encode(['error' => 'oauth_no_token', 'request_id' => $requestId]);
+    exit;
+}
+
+capture_log('OAUTH_SUCCESS', ['token_length' => strlen($access)]);
+
+// Step 2: Capture the PayPal order
+capture_log('CAPTURE_REQUEST_START', [
+    'endpoint' => "$api/v2/checkout/orders/$order_id/capture",
+    'order_id' => $order_id
+]);
 
 $ch = curl_init("$api/v2/checkout/orders/$order_id/capture");
 curl_setopt_array($ch, [
@@ -40,30 +115,33 @@ curl_setopt_array($ch, [
 $res  = curl_exec($ch);
 $http = curl_getinfo($ch, CURLINFO_HTTP_CODE);
 $curl_err = curl_error($ch);
+$curl_errno = curl_errno($ch);
 curl_close($ch);
 
-// Ensure logs folder exists and provide a helper to write debug info
-$logDir = __DIR__ . '/../logs';
-if (!is_dir($logDir)) @mkdir($logDir, 0755, true);
-$logFile = $logDir . '/paypal_capture.log';
-function capture_log($label, $data) {
-    global $logFile;
-    $entry = '[' . date('Y-m-d H:i:s') . '] ' . $label . "\n";
-    if (is_array($data) || is_object($data)) $entry .= print_r($data, true);
-    else $entry .= (string)$data;
-    $entry .= "\n---\n";
-    @file_put_contents($logFile, $entry, FILE_APPEND | LOCK_EX);
-}
-
 // Log the raw curl response for debugging
-capture_log('paypal_curl_response_http_' . $http, $res === false ? "(curl failed) " . $curl_err : $res);
+capture_log('CAPTURE_RESPONSE', [
+    'http_code' => $http,
+    'curl_errno' => $curl_errno,
+    'curl_error' => $curl_err,
+    'response_length' => strlen($res),
+    'response_preview' => substr($res, 0, 1000)
+]);
+
+// Check for curl-level errors
+if ($curl_errno !== 0) {
+    capture_log('CAPTURE_CURL_ERROR', ['errno' => $curl_errno, 'error' => $curl_err]);
+    http_response_code(502);
+    $out = ['error' => 'capture_curl_fail', 'details' => $curl_err, 'request_id' => $requestId];
+    echo json_encode($out);
+    exit;
+}
 
 // Normalize response: ensure we always return valid JSON to the caller
 if ($res === false || $res === '') {
     // Curl-level failure or empty body
+    capture_log('CAPTURE_EMPTY_RESPONSE', ['http' => $http]);
     http_response_code(502);
-    $out = ['error' => 'paypal_empty_response', 'http' => $http, 'curl_error' => $curl_err];
-    capture_log('paypal_empty_response', $out);
+    $out = ['error' => 'paypal_empty_response', 'http' => $http, 'request_id' => $requestId];
     echo json_encode($out);
     exit;
 }
@@ -72,25 +150,36 @@ if ($res === false || $res === '') {
 $capture = json_decode($res, true);
 if (json_last_error() !== JSON_ERROR_NONE) {
     // PayPal returned non-JSON / malformed response — return it as raw string inside JSON
+    capture_log('CAPTURE_INVALID_JSON', [
+        'json_error' => json_last_error_msg(),
+        'http' => $http,
+        'raw_preview' => substr($res, 0, 500)
+    ]);
     http_response_code(502);
-    $out = ['error' => 'paypal_invalid_json', 'http' => $http, 'raw' => $res];
-    capture_log('paypal_invalid_json', $out);
+    $out = ['error' => 'paypal_invalid_json', 'http' => $http, 'request_id' => $requestId];
     echo json_encode($out);
     exit;
 }
 
 if ($http !== 201 && $http !== 200) {
+    capture_log('CAPTURE_HTTP_ERROR', [
+        'http_code' => $http,
+        'response' => $capture
+    ]);
     http_response_code($http);
     // Return structured JSON with PayPal's decoded response
-    $out = ['error' => 'paypal_capture_failed', 'http' => $http, 'response' => $capture];
-    capture_log('paypal_capture_failed', $out);
+    $out = ['error' => 'paypal_capture_failed', 'http' => $http, 'paypal_error' => $capture, 'request_id' => $requestId];
     echo json_encode($out);
     exit;
 }
 
 // Extract payment details
 $txid = null;
-capture_log('paypal_capture_success', $capture);
+capture_log('CAPTURE_SUCCESS', [
+    'status' => $capture['status'] ?? 'UNKNOWN',
+    'id' => $capture['id'] ?? 'UNKNOWN'
+]);
+
 if (isset($capture['purchase_units'][0]['payments']['captures'][0])) {
     $txid = $capture['purchase_units'][0]['payments']['captures'][0]['id'] ?? null;
 }
@@ -99,28 +188,48 @@ if (isset($capture['purchase_units'][0]['payments']['captures'][0])) {
 $custom_id = $capture['purchase_units'][0]['custom_id'] ?? null;
 $captureStatus = $capture['status'] ?? null;
 
+capture_log('PAYMENT_DETAILS', [
+    'txid' => $txid,
+    'custom_id' => $custom_id,
+    'status' => $captureStatus
+]);
+
 if ($captureStatus === 'COMPLETED' && $custom_id) {
+    capture_log('STARTING_DB_PROCESSING', ['custom_id' => $custom_id, 'status' => $captureStatus]);
+    
     // Connect to database using mysqli (standalone - no panel dependencies)
     $db = mysqli_connect($db_host, $db_user, $db_pass, $db_name);
     if (!$db) {
-        error_log('capture_order.php: DB connection failed - ' . mysqli_connect_error());
-        echo json_encode(['error' => 'db_connection_failed', 'status' => $captureStatus]);
+        $dbError = mysqli_connect_error();
+        capture_log('DB_CONNECTION_FAILED', [
+            'error' => $dbError,
+            'host' => $db_host,
+            'db_name' => $db_name
+        ]);
+        error_log('capture_order.php: DB connection failed - ' . $dbError);
+        echo json_encode(['error' => 'db_connection_failed', 'status' => $captureStatus, 'request_id' => $requestId]);
         exit;
     }
+    
+    capture_log('DB_CONNECTED', ['database' => $db_name]);
 
     // Get coupon information from session if available
+    session_start();
     $applied_coupon = isset($_SESSION['applied_coupon']) ? $_SESSION['applied_coupon'] : null;
     $coupon_id = $applied_coupon ? intval($applied_coupon['coupon_id']) : null;
     
-    // Find all invoices with status='due' for this user (cart session)
-    // For now, we'll mark ALL due invoices for the logged-in user as paid
-    // TODO: Improve to match specific invoice_id from custom_id if cart sends it
-    session_start();
     // Check both website_user_id and user_id for compatibility
     $user_id = isset($_SESSION['website_user_id']) ? intval($_SESSION['website_user_id']) : 
                (isset($_SESSION['user_id']) ? intval($_SESSION['user_id']) : 0);
     
+    capture_log('SESSION_INFO', [
+        'user_id' => $user_id,
+        'coupon_id' => $coupon_id,
+        'session_keys' => array_keys($_SESSION)
+    ]);
+    
     if ($user_id > 0) {
+        capture_log('PROCESSING_INVOICES', ['user_id' => $user_id, 'custom_id' => $custom_id]);
         // Mark all due invoices for this user as paid, including coupon_id if applicable
         $now = date('Y-m-d H:i:s');
         $esc_txid = mysqli_real_escape_string($db, $txid);
@@ -131,26 +240,52 @@ if ($captureStatus === 'COMPLETED' && $custom_id) {
             $updateInvoices .= ", coupon_id=$coupon_id";
         }
         $updateInvoices .= " WHERE user_id=$user_id AND status='due'";
-        mysqli_query($db, $updateInvoices);
+        
+        capture_log('UPDATE_INVOICES_QUERY', ['sql' => $updateInvoices]);
+        
+        $updateResult = mysqli_query($db, $updateInvoices);
+        if (!$updateResult) {
+            capture_log('UPDATE_INVOICES_FAILED', ['error' => mysqli_error($db)]);
+        } else {
+            $affectedRows = mysqli_affected_rows($db);
+            capture_log('UPDATE_INVOICES_SUCCESS', ['affected_rows' => $affectedRows]);
+        }
         
         // Update coupon usage count if a coupon was applied
         if ($coupon_id) {
             $updateCoupon = "UPDATE {$table_prefix}billing_coupons 
                             SET current_uses = current_uses + 1 
                             WHERE coupon_id = $coupon_id";
-            mysqli_query($db, $updateCoupon);
+            capture_log('UPDATE_COUPON_QUERY', ['sql' => $updateCoupon]);
+            
+            $couponResult = mysqli_query($db, $updateCoupon);
+            if (!$couponResult) {
+                capture_log('UPDATE_COUPON_FAILED', ['error' => mysqli_error($db)]);
+            } else {
+                capture_log('UPDATE_COUPON_SUCCESS', ['affected_rows' => mysqli_affected_rows($db)]);
+            }
             
             // Clear coupon from session after use (for one-time coupons)
             if ($applied_coupon && $applied_coupon['usage_type'] === 'one_time') {
                 unset($_SESSION['applied_coupon']);
+                capture_log('COUPON_CLEARED', ['type' => 'one_time']);
             }
         }
         
         // Get all invoices we just marked paid
         $getInvoices = "SELECT * FROM {$table_prefix}billing_invoices WHERE user_id=$user_id AND payment_txid='$esc_txid'";
+        capture_log('GET_INVOICES_QUERY', ['sql' => $getInvoices]);
+        
         $invoicesResult = mysqli_query($db, $getInvoices);
+        if (!$invoicesResult) {
+            capture_log('GET_INVOICES_FAILED', ['error' => mysqli_error($db)]);
+        } else {
+            $invoiceCount = mysqli_num_rows($invoicesResult);
+            capture_log('GET_INVOICES_SUCCESS', ['count' => $invoiceCount]);
+        }
         
         // For each invoice, either create a new order or extend existing one (renewal)
+        $processedInvoices = 0;
         while ($inv = mysqli_fetch_assoc($invoicesResult)) {
             $invoice_id = intval($inv['invoice_id']);
             $existing_order_id = intval($inv['order_id'] ?? 0);
@@ -166,8 +301,17 @@ if ($captureStatus === 'COMPLETED' && $custom_id) {
             $ftp_pw = mysqli_real_escape_string($db, $inv['ftp_password']);
             $inv_coupon_id = intval($inv['coupon_id'] ?? 0);
             
+            capture_log('PROCESSING_INVOICE', [
+                'invoice_id' => $invoice_id,
+                'existing_order_id' => $existing_order_id,
+                'service_id' => $service_id,
+                'home_name' => $home_name,
+                'amount' => $amount
+            ]);
+            
             // Check if this is a renewal (existing order_id > 0) or new order (order_id = 0)
             if ($existing_order_id > 0) {
+                capture_log('RENEWAL_DETECTED', ['order_id' => $existing_order_id, 'invoice_id' => $invoice_id]);
                 // RENEWAL: Extend the existing order's end_date
                 // Calculate months to add based on qty and duration
                 $months = 0;
@@ -199,13 +343,27 @@ if ($captureStatus === 'COMPLETED' && $custom_id) {
                     $updateOrder = "UPDATE {$table_prefix}billing_orders 
                                    SET end_date='$new_end_date', status='paid', payment_txid='$esc_txid', paid_ts='$now'
                                    WHERE order_id=$existing_order_id";
+                    capture_log('UPDATE_ORDER_QUERY', ['sql' => $updateOrder]);
+                    
                     if (mysqli_query($db, $updateOrder)) {
+                        capture_log('ORDER_EXTENDED_SUCCESS', [
+                            'order_id' => $existing_order_id,
+                            'new_end_date' => $new_end_date,
+                            'invoice_id' => $invoice_id
+                        ]);
                         error_log("capture_order.php: Extended order $existing_order_id end_date to $new_end_date for invoice $invoice_id");
+                        $processedInvoices++;
                     } else {
-                        error_log("capture_order.php: Failed to extend order $existing_order_id: " . mysqli_error($db));
+                        $dbError = mysqli_error($db);
+                        capture_log('ORDER_EXTENDED_FAILED', [
+                            'order_id' => $existing_order_id,
+                            'error' => $dbError
+                        ]);
+                        error_log("capture_order.php: Failed to extend order $existing_order_id: " . $dbError);
                     }
                 }
             } else {
+                capture_log('NEW_ORDER_DETECTED', ['invoice_id' => $invoice_id]);
                 // NEW ORDER: Create a new order record
                 // Calculate end_date based on qty * duration
                 $end_date = date('Y-m-d H:i:s', strtotime("+$qty $duration"));
@@ -221,25 +379,58 @@ if ($captureStatus === 'COMPLETED' && $custom_id) {
                     '$esc_txid', '$now'" . ($inv_coupon_id ? ", $inv_coupon_id" : "") . "
                 )";
                 
+                capture_log('INSERT_ORDER_QUERY', ['sql' => substr($insertOrder, 0, 500)]);
+                
                 if (mysqli_query($db, $insertOrder)) {
                     $new_order_id = mysqli_insert_id($db);
                     
+                    capture_log('ORDER_CREATED_SUCCESS', [
+                        'new_order_id' => $new_order_id,
+                        'invoice_id' => $invoice_id
+                    ]);
+                    
                     // Link invoice to order
                     $linkInvoice = "UPDATE {$table_prefix}billing_invoices SET order_id=$new_order_id WHERE invoice_id=$invoice_id";
-                    mysqli_query($db, $linkInvoice);
+                    capture_log('LINK_INVOICE_QUERY', ['sql' => $linkInvoice]);
+                    
+                    if (mysqli_query($db, $linkInvoice)) {
+                        capture_log('INVOICE_LINKED_SUCCESS', ['invoice_id' => $invoice_id, 'order_id' => $new_order_id]);
+                    } else {
+                        capture_log('INVOICE_LINK_FAILED', ['error' => mysqli_error($db)]);
+                    }
                     
                     error_log("capture_order.php: Created order $new_order_id for invoice $invoice_id");
+                    $processedInvoices++;
                 } else {
-                    error_log("capture_order.php: Failed to create order for invoice $invoice_id: " . mysqli_error($db));
+                    $dbError = mysqli_error($db);
+                    capture_log('ORDER_CREATE_FAILED', [
+                        'invoice_id' => $invoice_id,
+                        'error' => $dbError
+                    ]);
+                    error_log("capture_order.php: Failed to create order for invoice $invoice_id: " . $dbError);
                 }
             }
         }
         
+        capture_log('PROCESSING_COMPLETE', [
+            'processed_invoices' => $processedInvoices,
+            'user_id' => $user_id
+        ]);
+        
         mysqli_close($db);
+    } else {
+        capture_log('NO_USER_ID', ['session_data' => $_SESSION]);
     }
+} else {
+    capture_log('SKIP_PROCESSING', [
+        'captureStatus' => $captureStatus,
+        'custom_id' => $custom_id,
+        'reason' => !$captureStatus ? 'no_status' : (!$custom_id ? 'no_custom_id' : 'status_not_completed')
+    ]);
 }
 
 // Return the full PayPal response (normalized JSON) for proper processing
+capture_log('REQUEST_COMPLETE', ['returning_status' => $captureStatus]);
 echo json_encode($capture);
 
 ?>
diff --git a/modules/billing/api/create_order.php b/modules/billing/api/create_order.php
index 253f2d0a..33cd06b7 100644
--- a/modules/billing/api/create_order.php
+++ b/modules/billing/api/create_order.php
@@ -1,13 +1,65 @@
 <?php
+/**
+ * PayPal Create Order API Endpoint
+ * Enhanced with comprehensive logging for debugging
+ */
+
+// Ensure all errors are logged, not displayed (to prevent JSON corruption)
+ini_set('display_errors', '0');
+error_reporting(E_ALL);
+
 require_once(__DIR__ . '/../includes/config.inc.php');
 // create_order for PayPal — adapted to run from _website/api
 $sandbox       = true; // flip to false for Live
 $client_id     = 'AfvY_C2zA_hTHxHq7TIhtOeub4xBdySYrt_Hjj3d_WYQwjWI9NfOAVOTeResx2rgZ_nP5tOoxQSAHw8c';
 $client_secret = 'EJ216np9cAj9n7KSddez3fLVxGe-zi4oKKKl1YGqPp88XIikr4Qzbxh0XW2as-V6LgdX-upjtQAg9dC0';
 
+// Setup comprehensive logging
+$logDir = __DIR__ . '/../logs';
+@mkdir($logDir, 0755, true);
+$logFile = $logDir . '/paypal_create_order.log';
+$requestId = uniqid('req_', true); // Unique request identifier for tracking
+
+function create_order_log($label, $data) {
+    global $logFile, $requestId;
+    $timestamp = date('Y-m-d H:i:s');
+    $entry = "[$timestamp] [$requestId] $label\n";
+    if (is_array($data) || is_object($data)) {
+        $entry .= print_r($data, true);
+    } else {
+        $entry .= (string)$data;
+    }
+    $entry .= "\n" . str_repeat('-', 80) . "\n";
+    @file_put_contents($logFile, $entry, FILE_APPEND | LOCK_EX);
+}
+
+create_order_log('REQUEST_START', [
+    'method' => $_SERVER['REQUEST_METHOD'] ?? 'UNKNOWN',
+    'remote_addr' => $_SERVER['REMOTE_ADDR'] ?? 'UNKNOWN',
+    'user_agent' => $_SERVER['HTTP_USER_AGENT'] ?? 'UNKNOWN',
+]);
+
 header('Content-Type: application/json');
 
-$in = json_decode(file_get_contents('php://input'), true) ?: [];
+// Read and parse input
+$rawInput = file_get_contents('php://input');
+create_order_log('RAW_INPUT', substr($rawInput, 0, 2000)); // Log first 2000 chars
+
+$in = json_decode($rawInput, true);
+if (json_last_error() !== JSON_ERROR_NONE) {
+    create_order_log('JSON_DECODE_ERROR', [
+        'error' => json_last_error_msg(),
+        'raw_input_length' => strlen($rawInput),
+        'raw_input_preview' => substr($rawInput, 0, 500)
+    ]);
+    http_response_code(400);
+    echo json_encode(['error' => 'invalid_json', 'message' => json_last_error_msg(), 'request_id' => $requestId]);
+    exit;
+}
+
+if (!$in) {
+    $in = [];
+}
 
 $amount_in    = $in['amount'] ?? '0.00';
 $currency     = $in['currency'] ?? 'USD';
@@ -19,6 +71,15 @@ $cancel_url   = $in['cancel_url'] ?? null;
 $items        = (isset($in['items']) && is_array($in['items'])) ? $in['items'] : null;
 $line_invoices= (isset($in['line_invoices']) && is_array($in['line_invoices'])) ? $in['line_invoices'] : null;
 
+create_order_log('PARSED_INPUT', [
+    'amount' => $amount_in,
+    'currency' => $currency,
+    'invoice_id' => $invoice_id,
+    'custom_id' => $custom_id,
+    'items_count' => $items ? count($items) : 0,
+    'line_invoices_count' => $line_invoices ? count($line_invoices) : 0
+]);
+
 $amount_value = number_format((float)$amount_in, 2, '.', '');
 if ($items) {
   $sum = 0.00;
@@ -28,9 +89,23 @@ if ($items) {
     $sum += $qty * $val;
   }
   $amount_value = number_format($sum, 2, '.', '');
+  create_order_log('AMOUNT_CALCULATED', [
+    'original_amount' => $amount_in,
+    'calculated_from_items' => $amount_value,
+    'items_sum' => $sum
+  ]);
 }
 
 $api = $sandbox ? 'https://api-m.sandbox.paypal.com' : 'https://api-m.paypal.com';
+create_order_log('PAYPAL_API_CONFIG', [
+    'sandbox_mode' => $sandbox,
+    'api_base' => $api,
+    'has_client_id' => !empty($client_id),
+    'has_client_secret' => !empty($client_secret)
+]);
+
+// Step 1: Get OAuth token
+create_order_log('OAUTH_REQUEST_START', ['endpoint' => "$api/v1/oauth2/token"]);
 
 $ch = curl_init("$api/v1/oauth2/token");
 curl_setopt_array($ch, [
@@ -42,14 +117,51 @@ curl_setopt_array($ch, [
 ]);
 $tok  = curl_exec($ch);
 $http = curl_getinfo($ch, CURLINFO_HTTP_CODE);
+$curl_errno = curl_errno($ch);
+$curl_error = curl_error($ch);
 curl_close($ch);
-if ($http !== 200) { http_response_code(500); echo json_encode(['error'=>'oauth_fail']); exit; }
+
+create_order_log('OAUTH_RESPONSE', [
+    'http_code' => $http,
+    'curl_errno' => $curl_errno,
+    'curl_error' => $curl_error,
+    'response_length' => strlen($tok),
+    'response_preview' => substr($tok, 0, 200)
+]);
+
+if ($curl_errno !== 0) {
+    create_order_log('OAUTH_CURL_ERROR', ['errno' => $curl_errno, 'error' => $curl_error]);
+    http_response_code(502);
+    echo json_encode(['error' => 'oauth_curl_fail', 'details' => $curl_error, 'request_id' => $requestId]);
+    exit;
+}
+
+if ($http !== 200) {
+    create_order_log('OAUTH_HTTP_ERROR', ['http_code' => $http, 'response' => $tok]);
+    http_response_code(500);
+    echo json_encode(['error' => 'oauth_fail', 'http_code' => $http, 'request_id' => $requestId]);
+    exit;
+}
+
 $access = json_decode($tok, true)['access_token'] ?? null;
-if (!$access) { http_response_code(500); echo json_encode(['error'=>'oauth_no_token']); exit; }
+if (!$access) {
+    create_order_log('OAUTH_NO_TOKEN', ['response' => $tok]);
+    http_response_code(500);
+    echo json_encode(['error' => 'oauth_no_token', 'request_id' => $requestId]);
+    exit;
+}
+
+create_order_log('OAUTH_SUCCESS', ['token_length' => strlen($access)]);
 
 // Update site base URL to exclude 'modules/billing'
 $siteBaseUrl = 'http://gameservers.world';
 
+create_order_log('URL_PROCESSING_BEFORE', [
+    'return_url' => $return_url,
+    'cancel_url' => $cancel_url,
+    'site_base' => $siteBaseUrl
+]);
+
 // Ensure return_url and cancel_url are absolute URLs (relative to site root)
 if (strpos($return_url, 'http') !== 0) {
     $return_url = $siteBaseUrl . '/' . ltrim($return_url, '/');
@@ -58,6 +170,11 @@ if (strpos($cancel_url, 'http') !== 0) {
     $cancel_url = $siteBaseUrl . '/' . ltrim($cancel_url, '/');
 }
 
+create_order_log('URL_PROCESSING_AFTER', [
+    'return_url' => $return_url,
+    'cancel_url' => $cancel_url
+]);
+
 $purchaseUnit = [
   'amount' => [ 'currency_code' => $currency, 'value' => $amount_value ],
   'description' => $description,
@@ -75,17 +192,10 @@ $body = [
   'application_context' => [ 'return_url'=>$return_url, 'cancel_url'=>$cancel_url, 'user_action'=>'PAY_NOW' ]
 ];
 
-// Log the payload for debugging
-$logDir = __DIR__ . '/../data';
-@mkdir($logDir, 0775, true);
-$logFile = $logDir . '/create_order_payload.log';
-$logEntry = date('Y-m-d H:i:s') . "\n" . json_encode($body, JSON_PRETTY_PRINT) . "\n\n";
-@file_put_contents($logFile, $logEntry, FILE_APPEND);
+create_order_log('PAYPAL_ORDER_PAYLOAD', $body);
 
-// Log corrected URLs for debugging
-$logFile = $logDir . '/corrected_urls.log';
-$logEntry = date('Y-m-d H:i:s') . "\nReturn URL: $return_url\nCancel URL: $cancel_url\n\n";
-@file_put_contents($logFile, $logEntry, FILE_APPEND);
+// Step 2: Create PayPal order
+create_order_log('CREATE_ORDER_REQUEST_START', ['endpoint' => "$api/v2/checkout/orders"]);
 
 $ch = curl_init("$api/v2/checkout/orders");
 curl_setopt_array($ch, [
@@ -96,20 +206,61 @@ curl_setopt_array($ch, [
 ]);
 $res  = curl_exec($ch);
 $http = curl_getinfo($ch, CURLINFO_HTTP_CODE);
+$curl_errno = curl_errno($ch);
+$curl_error = curl_error($ch);
 curl_close($ch);
 
-if ($http !== 201) { 
-  // Log error for debugging
-  $logDir = __DIR__ . '/../data';
-  @mkdir($logDir, 0775, true);
-  $logFile = $logDir . '/create_order_errors.log';
-  $logEntry = date('Y-m-d H:i:s') . " HTTP $http: " . substr($res, 0, 500) . "\n";
-  @file_put_contents($logFile, $logEntry, FILE_APPEND);
-  
-  http_response_code($http); 
-  echo $res; 
-  exit; 
+create_order_log('CREATE_ORDER_RESPONSE', [
+    'http_code' => $http,
+    'curl_errno' => $curl_errno,
+    'curl_error' => $curl_error,
+    'response_length' => strlen($res),
+    'response' => substr($res, 0, 1000) // First 1000 chars of response
+]);
+
+if ($curl_errno !== 0) {
+    create_order_log('CREATE_ORDER_CURL_ERROR', ['errno' => $curl_errno, 'error' => $curl_error]);
+    http_response_code(502);
+    echo json_encode(['error' => 'create_order_curl_fail', 'details' => $curl_error, 'request_id' => $requestId]);
+    exit;
 }
+
+if ($http !== 201) {
+    create_order_log('CREATE_ORDER_HTTP_ERROR', [
+        'http_code' => $http,
+        'response' => $res,
+        'payload_sent' => $body
+    ]);
+    
+    // Try to parse PayPal error response
+    $errorData = json_decode($res, true);
+    http_response_code($http);
+    echo json_encode([
+        'error' => 'create_order_failed',
+        'http_code' => $http,
+        'paypal_error' => $errorData,
+        'request_id' => $requestId
+    ]);
+    exit;
+}
+
+// Success - parse and validate response
+$orderData = json_decode($res, true);
+if (json_last_error() !== JSON_ERROR_NONE) {
+    create_order_log('CREATE_ORDER_INVALID_JSON', [
+        'json_error' => json_last_error_msg(),
+        'response' => $res
+    ]);
+    http_response_code(502);
+    echo json_encode(['error' => 'invalid_paypal_response', 'request_id' => $requestId]);
+    exit;
+}
+
+create_order_log('CREATE_ORDER_SUCCESS', [
+    'order_id' => $orderData['id'] ?? 'UNKNOWN',
+    'status' => $orderData['status'] ?? 'UNKNOWN'
+]);
+
 echo $res;
 
 ?>
diff --git a/modules/billing/api/log_error.php b/modules/billing/api/log_error.php
new file mode 100644
index 00000000..79d57aeb
--- /dev/null
+++ b/modules/billing/api/log_error.php
@@ -0,0 +1,44 @@
+<?php
+/**
+ * Client-side error logging endpoint
+ * Logs JavaScript errors from the cart page for debugging
+ */
+
+// Ensure all errors are logged, not displayed
+ini_set('display_errors', '0');
+error_reporting(E_ALL);
+
+header('Content-Type: application/json');
+
+// Setup logging
+$logDir = __DIR__ . '/../logs';
+@mkdir($logDir, 0755, true);
+$logFile = $logDir . '/client_errors.log';
+
+function log_client_error($data) {
+    global $logFile;
+    $timestamp = date('Y-m-d H:i:s');
+    $entry = "[$timestamp] CLIENT ERROR\n";
+    $entry .= "IP: " . ($_SERVER['REMOTE_ADDR'] ?? 'UNKNOWN') . "\n";
+    $entry .= "User Agent: " . ($_SERVER['HTTP_USER_AGENT'] ?? 'UNKNOWN') . "\n";
+    if (is_array($data) || is_object($data)) {
+        $entry .= print_r($data, true);
+    } else {
+        $entry .= (string)$data;
+    }
+    $entry .= "\n" . str_repeat('-', 80) . "\n";
+    @file_put_contents($logFile, $entry, FILE_APPEND | LOCK_EX);
+}
+
+// Read and parse input
+$rawInput = file_get_contents('php://input');
+$data = json_decode($rawInput, true);
+
+if ($data) {
+    log_client_error($data);
+    echo json_encode(['status' => 'logged']);
+} else {
+    log_client_error(['raw_input' => $rawInput, 'error' => 'Invalid JSON']);
+    echo json_encode(['status' => 'error', 'message' => 'Invalid JSON']);
+}
+?>
diff --git a/modules/billing/cart.php b/modules/billing/cart.php
index 83f2ca5a..33d80f6d 100644
--- a/modules/billing/cart.php
+++ b/modules/billing/cart.php
@@ -597,12 +597,37 @@ $apiBase = 'api';
     return_url, cancel_url
   });
 
-  function setStatus(msg){ if(statusEl) statusEl.textContent = msg; }
+  function setStatus(msg, isError = false){ 
+    if(statusEl) {
+      statusEl.textContent = msg; 
+      statusEl.style.color = isError ? '#dc3545' : '#000';
+      statusEl.style.fontWeight = isError ? 'bold' : 'normal';
+    }
+  }
+  
+  function logError(context, error) {
+    const errorData = {
+      timestamp: new Date().toISOString(),
+      context: context,
+      error: error,
+      invoice_id: invoice_id,
+      amount: amount
+    };
+    console.error('PayPal Error:', errorData);
+    // Try to send error to server for logging
+    fetch("<?= $apiBase ?>/log_error.php", {
+      method: "POST",
+      headers: {"Content-Type":"application/json"},
+      body: JSON.stringify(errorData)
+    }).catch(e => console.error('Failed to log error to server:', e));
+  }
 
 
   paypal.Buttons({
     createOrder: function() {
       setStatus('Creating order…');
+      console.log('createOrder: Starting request to create_order.php');
+      
       return fetch("<?= $apiBase ?>/create_order.php", {
         method: "POST",
         headers: {"Content-Type":"application/json"},
@@ -615,51 +640,114 @@ $apiBase = 'api';
         })
       })
       .then(res => {
+        console.log('createOrder: Response received', { status: res.status, ok: res.ok });
         if (!res.ok) {
           return res.text().then(errText => {
-            throw new Error('API error ' + res.status + ': ' + errText.substring(0, 200));
+            console.error('createOrder: Error response text:', errText);
+            logError('create_order_http_error', { status: res.status, response: errText });
+            
+            // Try to parse as JSON for better error display
+            let errorMsg = 'API error ' + res.status;
+            try {
+              const errJson = JSON.parse(errText);
+              if (errJson.error) errorMsg += ': ' + errJson.error;
+              if (errJson.request_id) errorMsg += ' (Ref: ' + errJson.request_id + ')';
+            } catch (e) {
+              errorMsg += ': ' + errText.substring(0, 100);
+            }
+            throw new Error(errorMsg);
           });
         }
         return res.json();
       })
       .then(data => {
-        if (!data.id) { 
-          throw new Error(JSON.stringify(data).substring(0, 200) || 'No order id'); 
+        console.log('createOrder: Parsed response', data);
+        if (!data.id) {
+          const errMsg = 'No order ID in response';
+          console.error('createOrder:', errMsg, data);
+          logError('create_order_no_id', { response: data });
+          throw new Error(errMsg + (data.request_id ? ' (Ref: ' + data.request_id + ')' : '')); 
         }
         setStatus('Order created.');
+        console.log('createOrder: Success, order ID:', data.id);
         return data.id;
       })
       .catch(err => {
-        setStatus('PayPal error: ' + err.message);
+        console.error('createOrder: Caught error', err);
+        const errorMsg = 'Failed to create order: ' + err.message;
+        setStatus(errorMsg, true);
+        logError('create_order_exception', { message: err.message, stack: err.stack });
         throw err;
       });
     },
 
     onApprove: function(data) {
       setStatus('Capturing payment…');
+      console.log('onApprove: Starting capture for order', data.orderID);
+      
       return fetch("<?= $apiBase ?>/capture_order.php", {
         method: "POST",
         headers: {"Content-Type":"application/json"},
         body: JSON.stringify({ order_id: data.orderID })
       })
-      .then(res => res.json())
+      .then(res => {
+        console.log('onApprove: Capture response received', { status: res.status, ok: res.ok });
+        if (!res.ok) {
+          return res.text().then(errText => {
+            console.error('onApprove: Error response text:', errText);
+            logError('capture_order_http_error', { status: res.status, response: errText });
+            
+            let errorMsg = 'Capture failed (HTTP ' + res.status + ')';
+            try {
+              const errJson = JSON.parse(errText);
+              if (errJson.error) errorMsg += ': ' + errJson.error;
+              if (errJson.request_id) errorMsg += ' (Ref: ' + errJson.request_id + ')';
+            } catch (e) {
+              errorMsg += ': ' + errText.substring(0, 100);
+            }
+            throw new Error(errorMsg);
+          });
+        }
+        return res.json();
+      })
       .then(capture => {
+        console.log('onApprove: Parsed capture response', capture);
         if (capture.status === 'COMPLETED') {
+          console.log('onApprove: Payment completed, redirecting to success page');
+          setStatus('Payment completed! Redirecting...');
           // go to your return page; webhook will fill data/<invoice_id>.json
           window.location.href = return_url;
+        } else if (capture.error) {
+          const errorMsg = 'Capture error: ' + capture.error + (capture.request_id ? ' (Ref: ' + capture.request_id + ')' : '');
+          console.error('onApprove:', errorMsg);
+          logError('capture_order_error_response', capture);
+          setStatus(errorMsg, true);
         } else {
-          setStatus('Capture status: ' + capture.status);
+          const statusMsg = 'Unexpected capture status: ' + (capture.status || 'UNKNOWN');
+          console.warn('onApprove:', statusMsg, capture);
+          logError('capture_order_unexpected_status', capture);
+          setStatus(statusMsg, true);
         }
       })
-      .catch(err => setStatus('Error: ' + err.message));
+      .catch(err => {
+        console.error('onApprove: Caught error', err);
+        const errorMsg = 'Payment capture failed: ' + err.message;
+        setStatus(errorMsg, true);
+        logError('capture_order_exception', { message: err.message, stack: err.stack });
+      });
     },
 
     onCancel: function() {
+      console.log('onCancel: User cancelled payment');
+      logError('payment_cancelled', { invoice_id: invoice_id });
       window.location.href = cancel_url;
     },
 
     onError: function(err){
-      setStatus('PayPal error: ' + (err && err.message ? err.message : err));
+      console.error('onError: PayPal SDK error', err);
+      const errorMsg = 'PayPal error: ' + (err && err.message ? err.message : JSON.stringify(err));
+      setStatus(errorMsg, true);
+      logError('paypal_sdk_error', { error: err });
     }
   }).render('#paypal-button-container');
 })();