Fatal error: Uncaught Error: Class "ilBlockGUI" not found in /var/www/html/ilias/components/ILIAS/Dashboard/classes/class.ilDashboardContentBlockGUI.php:21 Stack trace: #0 {main} thrown in /var/www/html/ilias/components/ILIAS/Dashboard/classes/class.ilDashboardContentBlockGUI.php on line 21