Fatal error: Uncaught Error: Interface "ilExcRepoObjAssignmentInterface" not found in /var/www/html/ilias/components/ILIAS/Exercise/RepoObjectAssignment/classes/class.ilExcRepoObjAssignment.php:23 Stack trace: #0 {main} thrown in /var/www/html/ilias/components/ILIAS/Exercise/RepoObjectAssignment/classes/class.ilExcRepoObjAssignment.php on line 23