Fatal error: Uncaught Error: Class "TYPO3\CMS\Lowlevel\ConfigurationModuleProvider\AbstractProvider" not found in /var/www/html/dev.hallescherfc.de/vendor/typo3/cms-lowlevel/Classes/ConfigurationModuleProvider/BackendUserSettingsProvider.php:22 Stack trace: #0 {main} thrown in /var/www/html/dev.hallescherfc.de/vendor/typo3/cms-lowlevel/Classes/ConfigurationModuleProvider/BackendUserSettingsProvider.php on line 22