Fatal error: Uncaught Error: Class "TYPO3\CMS\Extbase\DomainObject\AbstractEntity" not found in /var/www/html/dev.hallescherfc.de/vendor/typo3/cms-beuser/Classes/Domain/Model/BackendUser.php:29 Stack trace: #0 {main} thrown in /var/www/html/dev.hallescherfc.de/vendor/typo3/cms-beuser/Classes/Domain/Model/BackendUser.php on line 29