Fatal error: Uncaught Error: Class "ILIAS\UI\Implementation\Render\DefaultRendererFactory" not found in /var/www/html/ilias/components/ILIAS/UI/src/Implementation/Component/MessageBox/MessageBoxRendererFactory.php:26 Stack trace: #0 {main} thrown in /var/www/html/ilias/components/ILIAS/UI/src/Implementation/Component/MessageBox/MessageBoxRendererFactory.php on line 26