Fatal error: Uncaught Error: Class "Whoops\Handler\Handler" not found in /var/www/html/ilias/components/ILIAS/Exceptions/classes/class.ilDelegatingHandler.php:35 Stack trace: #0 {main} thrown in /var/www/html/ilias/components/ILIAS/Exceptions/classes/class.ilDelegatingHandler.php on line 35