Fatal error: Uncaught Error: Class "EVO_RSVP_CPT" not found in /users/laufgruppe-lvb/www/wordpress/wp-content/plugins/eventon-rsvp-invitees/includes/class-invitee.php:6 Stack trace: #0 {main} thrown in /users/laufgruppe-lvb/www/wordpress/wp-content/plugins/eventon-rsvp-invitees/includes/class-invitee.php on line 6