Fatal error: Uncaught Error: Call to undefined function add_action() in /users/laufgruppe-lvb/www/wordpress/wp-content/plugins/clever-fox/inc/boostify/features/boostify-service.php:195 Stack trace: #0 {main} thrown in /users/laufgruppe-lvb/www/wordpress/wp-content/plugins/clever-fox/inc/boostify/features/boostify-service.php on line 195