diff --git a/Panel/CHANGELOG.md b/Panel/CHANGELOG.md
index bd6962af..a183c2fa 100644
--- a/Panel/CHANGELOG.md
+++ b/Panel/CHANGELOG.md
@@ -1,5 +1,8 @@
 # Changelog
 
+## 2026-05-18
+- **Panel registration stability + captcha fallback hardening:** Fixed a fatal syntax error in `modules/register/register-exec.php`, removed hardcoded/legacy registration redirects, added structured registration logging to `modules/register/logs/register.log` (auto-creates missing log dir), added duplicate username checks, added optional `users_pass_hash` write for PHP 8.3-compatible auth upgrades, and implemented graceful reCAPTCHA fallback when keys are missing/legacy-invalid or the widget reports an error so the themed registration flow no longer crashes with raw PHP errors.
+
 ## 2026-05-13
 - **Root Apache vhost template for split Panel/Website layout:** Added `SITES_AVAILABLE_EXAMPLE.conf` at repo root with ready-to-copy `sites-available` examples for both `Panel/` and `Website/`, covering HTTP→HTTPS redirects, SSL vhosts, example domains/paths, required Apache modules, Certbot (`--apache` and `--webroot`) commands, and verification/reload steps.
 - **Per-site Apache examples for direct deployment:** Added `examples/apache/panel.example.com.conf` and `examples/apache/website.example.com.conf` so each site can be copied directly into `/etc/apache2/sites-available/` with minimal edits.
diff --git a/Panel/docs/COPILOT_TODO.md b/Panel/docs/COPILOT_TODO.md
index f758df5d..738af1ed 100644
--- a/Panel/docs/COPILOT_TODO.md
+++ b/Panel/docs/COPILOT_TODO.md
@@ -14,3 +14,4 @@
 - Add an automated end-to-end check that verifies `create_servers.php` skips already-installed homes while still retrying existing-home orders with missing executable/IP-port/mod prerequisites.
 - Add a repeatable QA fixture that exercises `modules/billing/logs/provisioning_trace.log` writability failures and verifies payment success pages surface the traced provision result for paid and free orders.
 - Add an admin/serverlist UI badge that shows detected service OS variant (Windows/Linux/Any) from XML metadata next to each purchasable service row.
+- Add a panel settings health check that validates reCAPTCHA site/secret keys against active panel/storefront domains and warns admins before registration users see widget errors.
diff --git a/Panel/includes/database_mysqli.php b/Panel/includes/database_mysqli.php
index 46d39b73..e61632d9 100644
--- a/Panel/includes/database_mysqli.php
+++ b/Panel/includes/database_mysqli.php
@@ -432,7 +432,7 @@ class OGPDatabaseMySQL extends OGPDatabase
 		$user_id = mysqli_insert_id($this->link);
 		if( !$user_id )
 		{
-			echo mysqli_errno($this->link) . ": " . mysqli_error($this->link);
+			error_log("OGP addUser failed: " . mysqli_errno($this->link) . ": " . mysqli_error($this->link));
 			return false;
 		}
 		else
diff --git a/Panel/index.php b/Panel/index.php
index 87350ed1..280f2098 100644
--- a/Panel/index.php
+++ b/Panel/index.php
@@ -316,6 +316,8 @@ function ogpHome()
 				$_SESSION['users_lang'] = isset( $_GET['lang'] ) ? $_GET['lang'] : $userInfo['users_lang'];
 				$_SESSION['users_theme'] = $userInfo['users_theme'];
 				$_SESSION['users_api_key'] = $db->getApiToken($userInfo['user_id']);
+				require_once('modules/register/register_helpers.php');
+				register_log_event('login_succeeded', array('username' => $userInfo['users_login'], 'user_id' => $userInfo['user_id']));
 				print_success( get_lang("logging_in") ."...");
 				$db->logger( get_lang("logging_in") ."...");
 				$db->query("DELETE FROM `OGP_DB_PREFIXban_list` WHERE client_ip='$client_ip';");
@@ -474,4 +476,3 @@ function ogpHome()
 ?>
 
 
-
diff --git a/Panel/modules/register/register-exec.php b/Panel/modules/register/register-exec.php
index 6f098320..863309ee 100644
--- a/Panel/modules/register/register-exec.php
+++ b/Panel/modules/register/register-exec.php
@@ -34,9 +34,11 @@ function checkEmail($email) {
 }
 
 require_once("includes/functions.php");
+require_once(dirname(__FILE__) . '/register_helpers.php');
 function exec_ogp_module()
 {
 	global $db,$view,$settings;
+	startSession();
 		
 	$adminEmailList = '';
 	// Get email address of all admins to inform him when a user has registered.
@@ -68,14 +70,16 @@ function exec_ogp_module()
 	}
 		
 	//Sanitize the POST values
-	$users_fname = sanitizeInputStr($_POST['users_fname']);
-	$users_lname = sanitizeInputStr($_POST['users_lname']);
-	$users_login = sanitizeInputStr($_POST['login_name']);
-	$users_passwd = clean($_POST['users_passwd']);
-	$users_cpasswd = clean($_POST['users_cpasswd']);
-	$users_email = clean($_POST['users_email']);
-	$users_comment = clean($_POST['users_comment']);
-	$gRecaptchaResponse = clean($_POST['g-recaptcha-response']);
+	$users_fname = sanitizeInputStr(isset($_POST['users_fname']) ? $_POST['users_fname'] : '');
+	$users_lname = sanitizeInputStr(isset($_POST['users_lname']) ? $_POST['users_lname'] : '');
+	$users_login = sanitizeInputStr(isset($_POST['login_name']) ? $_POST['login_name'] : '');
+	$users_passwd = clean(isset($_POST['users_passwd']) ? $_POST['users_passwd'] : '');
+	$users_cpasswd = clean(isset($_POST['users_cpasswd']) ? $_POST['users_cpasswd'] : '');
+	$users_email = clean(isset($_POST['users_email']) ? $_POST['users_email'] : '');
+	$users_comment = clean(isset($_POST['users_comment']) ? $_POST['users_comment'] : '');
+	$gRecaptchaResponse = clean(isset($_POST['g-recaptcha-response']) ? $_POST['g-recaptcha-response'] : '');
+	$recaptcha_widget_error = clean(isset($_POST['recaptcha_widget_error']) ? $_POST['recaptcha_widget_error'] : '0');
+	register_log_event('registration_started', array('username' => $users_login, 'email' => $users_email));
 
 	if( !empty($users_fname) ) {
 	$input['users_fname'] = $users_fname;
@@ -115,6 +119,12 @@ function exec_ogp_module()
 		$errmsg_arr[] = get_lang('err_login_name');
 		$errflag = true;
 	}
+	elseif($db->getUser($users_login) != FALSE)
+	{
+		$errmsg_arr[] = get_lang('err_login_name');
+		$errflag = true;
+		register_log_event('registration_validation_failed', array('reason' => 'duplicate_username', 'username' => $users_login));
+	}
 	if($users_passwd == '') {
 		$errmsg_arr[] = get_lang('err_password');
 		$errflag = true;
@@ -137,21 +147,33 @@ function exec_ogp_module()
 		$errflag = true;
 	}
 	
-	if(!empty($settings['recaptcha_site_key']) && !empty($settings['recaptcha_secret_key'])){
-		$sitekey = $settings['recaptcha_site_key'];
-		$secretkey = $settings['recaptcha_secret_key'];
-	}else{
-		require_once('captchakeys.php');
-	}
-	
-	require('includes/classes/recaptcha/autoload.php');
-	$recaptcha = new \ReCaptcha\ReCaptcha($secretkey);
-	$resp = $recaptcha->verify($gRecaptchaResponse, $_SERVER["REMOTE_ADDR"]);
-
-	if (empty($gRecaptchaResponse) || !$resp->isSuccess())
+	$recaptcha = register_get_recaptcha_config($settings);
+	if($recaptcha['enabled'] && $recaptcha_widget_error !== '1')
 	{
-		$errmsg_arr[] = get_lang('err_captcha');
-		$errflag = true;
+		require_once('includes/classes/recaptcha/autoload.php');
+		try {
+			$captcha = new \ReCaptcha\ReCaptcha($recaptcha['secretkey']);
+			$resp = $captcha->verify($gRecaptchaResponse, isset($_SERVER["REMOTE_ADDR"]) ? $_SERVER["REMOTE_ADDR"] : '');
+			if (empty($gRecaptchaResponse) || !$resp->isSuccess())
+			{
+				$errmsg_arr[] = get_lang('err_captcha');
+				$errflag = true;
+				register_log_event('registration_captcha_failed', array('username' => $users_login));
+			}
+			else
+			{
+				register_log_event('registration_captcha_validated', array('username' => $users_login));
+			}
+		}
+		catch (Exception $e)
+		{
+			register_log_event('registration_captcha_exception', array('error' => $e->getMessage()));
+			register_log_event('registration_captcha_skipped', array('reason' => 'verification_exception'));
+		}
+	}
+	else
+	{
+		register_log_event('registration_captcha_skipped', array('reason' => $recaptcha['reason'], 'widget_error' => $recaptcha_widget_error));
 	}
 	
 	//Create INSERT query
@@ -161,11 +183,23 @@ function exec_ogp_module()
 		{
 			$errmsg_arr[] = get_lang('err_login_name');
 			$errflag = true;
+			register_log_event('registration_db_insert_failed', array('username' => $users_login));
 		}
 		else
 		{
 			$user = $db->getUser($users_login);
 			$user_id = $user['user_id'];
+			register_log_event('registration_db_insert_succeeded', array('username' => $users_login, 'user_id' => $user_id));
+
+			$users_pass_hash = password_hash($users_passwd, PASSWORD_DEFAULT);
+			if($users_pass_hash !== false)
+			{
+				$hash_column = $db->resultQuery("SHOW COLUMNS FROM `OGP_DB_PREFIXusers` LIKE 'users_pass_hash';");
+				if($hash_column)
+				{
+					$db->query("UPDATE `OGP_DB_PREFIXusers` SET `users_pass_hash` = '".$db->realEscapeSingle($users_pass_hash)."' WHERE `user_id` = ".(int)$user_id." LIMIT 1;");
+				}
+			}
 
 			$fields['users_fname'] = $users_fname;
 			$fields['users_lname'] = $users_lname;
@@ -195,19 +229,21 @@ function exec_ogp_module()
 				if($mail)
 				{
 					print_success(get_lang_f('your_account_details_has_been_sent_by_email_to',$users_email));
-					$view->refresh("http://xpgame.host,8);
+					$view->refresh("index.php",8);
 				}else{
-					$view->refresh("http://xpgame.host",8);
 					print_success(get_lang('account_created'));
+					$view->refresh("index.php",8);
 				}
+				register_log_event('registration_completed', array('username' => $users_login, 'user_id' => $user_id));
 			}
 			else
 			{
 				$user = $db->getUser($users_login);
 				$user_id = $user['user_id'];
 				$db->delUser($user_id);
-				print_failure('FAILURE: Unable to set user details, try again.');
+				print_failure('Unable to complete registration details. Please try again.');
 				$view->refresh("index.php?m=register&p=form&".$lang_switch,8);
+				register_log_event('registration_profile_update_failed', array('username' => $users_login, 'user_id' => $user_id));
 			}
 		}
 	}
@@ -215,8 +251,8 @@ function exec_ogp_module()
 	if($errflag) {
 		$_SESSION['ERRMSG_ARR'] = $errmsg_arr;
 		$_SESSION['INPUT'] = $input;
+		register_log_event('registration_validation_failed', array('username' => $users_login, 'errors' => $errmsg_arr));
 		$view->refresh("index.php?m=register&p=form&".$lang_switch,0);
 	}
 }
 ?>
-
diff --git a/Panel/modules/register/register.php b/Panel/modules/register/register.php
index c9f5bdf1..549869aa 100644
--- a/Panel/modules/register/register.php
+++ b/Panel/modules/register/register.php
@@ -25,8 +25,7 @@
 //Open Game Panel Free User Registration Add On By
 //  MarkDogg18769
 
-define("RECAPTCHA_API_SERVER", "http://www.google.com/recaptcha/api");
-define("RECAPTCHA_API_SECURE_SERVER", "https://www.google.com/recaptcha/api");
+require_once(dirname(__FILE__) . '/register_helpers.php');
 
 function exec_ogp_module()
 {
@@ -83,14 +82,22 @@ function exec_ogp_module()
 	$ft->add_field_hidden('users_comment',get_lang_f('registered_on', date("d/m/Y")) );
 	echo "<tr><td>&nbsp;</td><td align='right'>";
 	
-	if(!empty($settings['recaptcha_site_key']) && !empty($settings['recaptcha_secret_key'])){
-		$sitekey = $settings['recaptcha_site_key'];
-		$secretkey = $settings['recaptcha_secret_key'];
+	$recaptcha = register_get_recaptcha_config($settings);
+	if($recaptcha['enabled']){
+		echo recaptcha_get_html($recaptcha['sitekey']);
+		echo '<input type="hidden" id="recaptcha_widget_error" name="recaptcha_widget_error" value="0" />';
+		echo '<script type="text/javascript">
+		function registerRecaptchaWidgetError() {
+			var flag = document.getElementById("recaptcha_widget_error");
+			if (flag) flag.value = "1";
+		}
+		</script>';
+		register_log_event('registration_form_captcha_enabled');
 	}else{
-		require_once('captchakeys.php');
+		echo "<div style='color:#f8e58c;font-size:12px;'>Captcha is temporarily unavailable. Registration is still available.</div>";
+		echo '<input type="hidden" id="recaptcha_widget_error" name="recaptcha_widget_error" value="1" />';
+		register_log_event('registration_form_captcha_disabled', array('reason' => $recaptcha['reason']));
 	}
-	$use_ssl = ( isset($_SERVER['HTTPS']) and  get_true_boolean($_SERVER['HTTPS']) ) ? true : false;
-	echo recaptcha_get_html($sitekey,null,$use_ssl);
 	echo "</td></tr>";
     $ft->end_table();
     $ft->add_button("submit","Submit",get_lang('register_a_new_user'));
@@ -100,21 +107,15 @@ function exec_ogp_module()
 function recaptcha_get_html ($pubkey, $error = null, $use_ssl = false)
 {
 	if ($pubkey == null || $pubkey == '') {
-		die ("To use reCAPTCHA you must get an API key from <a href='https://www.google.com/recaptcha/admin/create'>https://www.google.com/recaptcha/admin/create</a>");
-	}
-	
-	if ($use_ssl) {
-		$server = RECAPTCHA_API_SECURE_SERVER;
-	} else {
-		$server = RECAPTCHA_API_SERVER;
+		return "";
 	}
 
 	$errorpart = "";
 	if ($error) {
 		$errorpart = "&amp;error=" . $error;
 	}
-      
-	return "<script src='" . $server . ".js'></script><div style='display: inline-block;' class='g-recaptcha' data-sitekey='" . $pubkey . "'></div>";
-       
+
+	return "<script src='https://www.google.com/recaptcha/api.js' async defer></script><div style='display: inline-block;' class='g-recaptcha' data-sitekey='" . $pubkey . "' data-error-callback='registerRecaptchaWidgetError'></div>";
+        
 }
 ?>
diff --git a/Panel/modules/register/register_helpers.php b/Panel/modules/register/register_helpers.php
new file mode 100644
index 00000000..4d0758b9
--- /dev/null
+++ b/Panel/modules/register/register_helpers.php
@@ -0,0 +1,75 @@
+<?php
+/*
+ *
+ * OGP - Open Game Panel
+ * Copyright (C) 2008 - 2018 The OGP Development Team
+ *
+ * http://www.opengamepanel.org/
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+ *
+ */
+
+function register_log_path()
+{
+	$log_dir = dirname(__FILE__) . '/logs';
+	if (!is_dir($log_dir)) {
+		@mkdir($log_dir, 0775, true);
+	}
+	return $log_dir . '/register.log';
+}
+
+function register_log_event($event, $context = array())
+{
+	$line = date('Y-m-d H:i:s') . ' | ' . $event;
+	if (!empty($context)) {
+		$line .= ' | ' . json_encode($context);
+	}
+	$line .= PHP_EOL;
+	@file_put_contents(register_log_path(), $line, FILE_APPEND | LOCK_EX);
+}
+
+function register_get_recaptcha_config($settings)
+{
+	$sitekey = isset($settings['recaptcha_site_key']) ? trim($settings['recaptcha_site_key']) : '';
+	$secretkey = isset($settings['recaptcha_secret_key']) ? trim($settings['recaptcha_secret_key']) : '';
+
+	if ($sitekey === '' || $secretkey === '') {
+		return array(
+			'enabled' => false,
+			'sitekey' => '',
+			'secretkey' => '',
+			'reason' => 'missing_settings'
+		);
+	}
+
+	// Legacy demo keys are frequently left in place and cause "Invalid site key".
+	if ($sitekey === '6Lc4osYSAAAAAHtYbHvsXIl0h1auXeiqPhagTXAj' && $secretkey === '6Lc4osYSAAAAAHK56NE9ZHLgw3ZuESHhF26bMoNx') {
+		return array(
+			'enabled' => false,
+			'sitekey' => '',
+			'secretkey' => '',
+			'reason' => 'legacy_demo_keys'
+		);
+	}
+
+	return array(
+		'enabled' => true,
+		'sitekey' => $sitekey,
+		'secretkey' => $secretkey,
+		'reason' => 'configured'
+	);
+}
+?>