Fatal error: Uncaught Error: Class "ILIAS\Setup\Agent\NullAgent" not found in /var/www/html/ilias/components/ILIAS/StudyProgramme/classes/Setup/class.ilStudyProgrammeSetupAgent.php:30 Stack trace: #0 {main} thrown in /var/www/html/ilias/components/ILIAS/StudyProgramme/classes/Setup/class.ilStudyProgrammeSetupAgent.php on line 30