Fatal error: Uncaught Error: Call to undefined function add_action() in /home/kacperg/public_html/kacpergr/wp-content/plugins/modula-best-grid-gallery/includes/class-modula-script-manager.php:20 Stack trace: #0 /home/kacperg/public_html/kacpergr/wp-content/plugins/modula-best-grid-gallery/includes/class-modula-script-manager.php(190): Modula_Script_Manager->__construct() #1 {main} thrown in /home/kacperg/public_html/kacpergr/wp-content/plugins/modula-best-grid-gallery/includes/class-modula-script-manager.php on line 20