Fatal error: Uncaught Error: Call to undefined function add_filter() in /users/laufgruppe-lvb/www/wordpress/wp-content/plugins/eventON_ALT/includes/class-evo-template-loader.php:13 Stack trace: #0 /users/laufgruppe-lvb/www/wordpress/wp-content/plugins/eventON_ALT/includes/class-evo-template-loader.php(110): EVO_Template_Loader->__construct() #1 {main} thrown in /users/laufgruppe-lvb/www/wordpress/wp-content/plugins/eventON_ALT/includes/class-evo-template-loader.php on line 13