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