Fatal error: Uncaught Error: Class "Symfony\Component\Console\Command\Command" not found in /var/www/html/dev.hallescherfc.de/vendor/typo3/cms-install/Classes/Command/LanguagePackCommand.php:35 Stack trace: #0 {main} thrown in /var/www/html/dev.hallescherfc.de/vendor/typo3/cms-install/Classes/Command/LanguagePackCommand.php on line 35