Fatal error: Uncaught Error: Call to undefined function add_action() in /home/pizzasam/public_html/britannia/wp-content/plugins/responsive-menu-pro/responsive-menu-pro.php:16 Stack trace: #0 {main} thrown in /home/pizzasam/public_html/britannia/wp-content/plugins/responsive-menu-pro/responsive-menu-pro.php on line 16