Fatal error: Uncaught Error: Class "TYPO3\CMS\Core\Resource\Collection\AbstractFileCollection" not found in /var/www/html/dev.hallescherfc.de/vendor/typo3/cms-core/Classes/Resource/Collection/FolderBasedFileCollection.php:26 Stack trace: #0 {main} thrown in /var/www/html/dev.hallescherfc.de/vendor/typo3/cms-core/Classes/Resource/Collection/FolderBasedFileCollection.php on line 26