Fatal error: Uncaught Error: Interface "Symfony\Component\Config\Builder\ConfigBuilderGeneratorInterface" not found in /var/www/html/v12.hallescherfc.de/vendor/symfony/config/Builder/ConfigBuilderGenerator.php:36 Stack trace: #0 {main} thrown in /var/www/html/v12.hallescherfc.de/vendor/symfony/config/Builder/ConfigBuilderGenerator.php on line 36