Fatal error: Uncaught Error: Call to undefined function add_action() in /users/laufgruppe-lvb/www/wordpress/wp-content/plugins/eventon-rsvp-invitees/includes/class-template_views.php:8 Stack trace: #0 /users/laufgruppe-lvb/www/wordpress/wp-content/plugins/eventon-rsvp-invitees/includes/class-template_views.php(242): EVORSI_Temp->__construct() #1 {main} thrown in /users/laufgruppe-lvb/www/wordpress/wp-content/plugins/eventon-rsvp-invitees/includes/class-template_views.php on line 8