Fatal error: Uncaught Error: Class "ilObjectListGUI" not found in /var/www/html/ilias/components/ILIAS/Exercise/classes/class.ilObjExerciseListGUI.php:24 Stack trace: #0 {main} thrown in /var/www/html/ilias/components/ILIAS/Exercise/classes/class.ilObjExerciseListGUI.php on line 24