Fatal error: Uncaught Error: Class "Symfony\Component\Console\Command\Command" not found in /opt/lampp/htdocs/forum/flarum/vendor/symfony/console/Command/DumpCompletionCommand.php:28 Stack trace: #0 {main} thrown in /opt/lampp/htdocs/forum/flarum/vendor/symfony/console/Command/DumpCompletionCommand.php on line 28