Fatal error: Uncaught Error: Class "ILIAS\GlobalScreen\Scope\MainMenu\Provider\AbstractStaticMainMenuProvider" not found in /var/www/html/ilias/components/ILIAS/OnScreenChat/classes/Provider/OnScreenChatProvider.php:45 Stack trace: #0 {main} thrown in /var/www/html/ilias/components/ILIAS/OnScreenChat/classes/Provider/OnScreenChatProvider.php on line 45