Fatal error: Uncaught Error: Class "TYPO3\CMS\Core\Tree\TableConfiguration\AbstractTableConfigurationTreeDataProvider" not found in /var/www/html/dev.hallescherfc.de/vendor/typo3/cms-core/Classes/Tree/TableConfiguration/DatabaseTreeDataProvider.php:38 Stack trace: #0 {main} thrown in /var/www/html/dev.hallescherfc.de/vendor/typo3/cms-core/Classes/Tree/TableConfiguration/DatabaseTreeDataProvider.php on line 38