Fatal error: Uncaught Error: Interface "ilExAssignmentTypeInterface" not found in /var/www/html/ilias/components/ILIAS/Exercise/Assignment/Types/class.ilExAssTypeUpload.php:24 Stack trace: #0 {main} thrown in /var/www/html/ilias/components/ILIAS/Exercise/Assignment/Types/class.ilExAssTypeUpload.php on line 24