Fatal error: Uncaught Error: Call to undefined function add_action() in C:\xampp\htdocs\wordpress\wp-content\pluginsBK\wp-mail-smtp\wp-mail-smtp-0.11.2.php:736 Stack trace: #0 {main} thrown in C:\xampp\htdocs\wordpress\wp-content\pluginsBK\wp-mail-smtp\wp-mail-smtp-0.11.2.php on line 736