Fatal error: Uncaught Error: Call to undefined function add_action() in /home/ola/public_html/wp-content/plugins/radiantthemes-mega-menu/lib/nav-menu.php:2 Stack trace: #0 {main} thrown in /home/ola/public_html/wp-content/plugins/radiantthemes-mega-menu/lib/nav-menu.php on line 2