Fatal error: Uncaught Error: Call to undefined function add_action() in /users/laufgruppe-lvb/www/wordpress/wp-content/plugins/eventon-tickets/includes/class-integration-virtualevents.php:12 Stack trace: #0 /users/laufgruppe-lvb/www/wordpress/wp-content/plugins/eventon-tickets/includes/class-integration-virtualevents.php(277): EVOTX_Virtual_Events->__construct() #1 {main} thrown in /users/laufgruppe-lvb/www/wordpress/wp-content/plugins/eventon-tickets/includes/class-integration-virtualevents.php on line 12