Fatal error: Uncaught Error: Class "TYPO3\CMS\Extbase\Domain\Model\FileReference" not found in /var/www/html/dev.hallescherfc.de/vendor/nng/nnhelpers/Classes/Domain/Model/FileReference.php:5 Stack trace: #0 {main} thrown in /var/www/html/dev.hallescherfc.de/vendor/nng/nnhelpers/Classes/Domain/Model/FileReference.php on line 5