Fatal error: Uncaught Error: Class "ilObjectGUI" not found in /var/www/html/ilias/components/ILIAS/Survey/Administration/class.ilObjSurveyAdministrationGUI.php:23 Stack trace: #0 {main} thrown in /var/www/html/ilias/components/ILIAS/Survey/Administration/class.ilObjSurveyAdministrationGUI.php on line 23