Fatal error: Uncaught Error: Class "Symfony\Component\Console\Command\Command" not found in /home/rcmch/test.m-s-i.ch/vendor/typo3/cms-backend/Classes/Command/LockBackendCommand.php:30 Stack trace: #0 {main} thrown in /home/rcmch/test.m-s-i.ch/vendor/typo3/cms-backend/Classes/Command/LockBackendCommand.php on line 30