Update wp-config.php

WWW_DATA/wp-config.php

 <?php
 
+/**
+ * Handle SSL reverse proxy
+ */
+if ($_SERVER['HTTP_X_FORWARDED_PROTO'] == 'https')
+    $_SERVER['HTTPS']='on';
+
+if (isset($_SERVER['HTTP_X_FORWARDED_HOST'])) {
+    $_SERVER['HTTP_HOST'] = $_SERVER['HTTP_X_FORWARDED_HOST'];
+}
 // BEGIN iThemes Security - Do not modify or remove this line
 // iThemes Security Config Details: 2
 define( 'DISALLOW_FILE_EDIT', true ); // Disable File Editor - Security > Settings > WordPress Tweaks > File Editor