Fatal error: Uncaught Error: Call to undefined function add_action() in /home/studiointoronto/public_html/wp-content/plugins/modula-best-grid-gallery/includes/admin/class-modula-addons.php:20 Stack trace: #0 /home/studiointoronto/public_html/wp-content/plugins/modula-best-grid-gallery/includes/admin/class-modula-addons.php(284): Modula_Addons->__construct() #1 /home/studiointoronto/public_html/wp-content/plugins/modula-best-grid-gallery/includes/admin/class-modula-addons.php(291): Modula_Addons::get_instance() #2 {main} thrown in /home/studiointoronto/public_html/wp-content/plugins/modula-best-grid-gallery/includes/admin/class-modula-addons.php on line 20