Fatal error: Uncaught Error: Interface "ILIAS\Setup\Agent" not found in /var/www/html/ilias/components/ILIAS/setup_/classes/class.ilCommonSetupAgent.php:31 Stack trace: #0 {main} thrown in /var/www/html/ilias/components/ILIAS/setup_/classes/class.ilCommonSetupAgent.php on line 31