Fatal error: Uncaught Error: Call to undefined function add_action() in /home/ioscotland/public_html/wp-content/plugins/cornerstone/includes/menu-item-custom-fields/menu-item-custom-fields-map.php:32 Stack trace: #0 /home/ioscotland/public_html/wp-content/plugins/cornerstone/includes/menu-item-custom-fields/menu-item-custom-fields-map.php(257): CS_Menu_Item_Custom_Fields_Map::init() #1 {main} thrown in /home/ioscotland/public_html/wp-content/plugins/cornerstone/includes/menu-item-custom-fields/menu-item-custom-fields-map.php on line 32