Fatal error: Uncaught Error: Class "ILIAS\StaticURL\Handler\BaseHandler" not found in /var/www/html/ilias/components/ILIAS/Calendar/classes/URL/CalendarStaticURLHandler.php:29 Stack trace: #0 {main} thrown in /var/www/html/ilias/components/ILIAS/Calendar/classes/URL/CalendarStaticURLHandler.php on line 29