Fatal error: Uncaught Error: Interface "ilCtrlIteratorInterface" not found in /var/www/html/ilias/components/ILIAS/UICore/classes/Iterator/class.ilCtrlArrayIterator.php:12 Stack trace: #0 {main} thrown in /var/www/html/ilias/components/ILIAS/UICore/classes/Iterator/class.ilCtrlArrayIterator.php on line 12