Fatal error: Uncaught Error: Class "TYPO3\CMS\Core\Utility\ExtensionManagementUtility" not found in /var/www/html/dev.hallescherfc.de/vendor/nng/nnhelpers/Configuration/TCA/tx_nnhelpers_domain_model_entry.php:5 Stack trace: #0 {main} thrown in /var/www/html/dev.hallescherfc.de/vendor/nng/nnhelpers/Configuration/TCA/tx_nnhelpers_domain_model_entry.php on line 5