Fatal error: Uncaught Error: Class "Symfony\Component\Console\Command\Command" not found in /opt/lampp/htdocs/forum/flarum/vendor/symfony/yaml/Command/LintCommand.php:35 Stack trace: #0 {main} thrown in /opt/lampp/htdocs/forum/flarum/vendor/symfony/yaml/Command/LintCommand.php on line 35