Fatal error: Uncaught Error: Class "Symfony\Component\Console\Output\StreamOutput" not found in /opt/lampp/htdocs/forum/flarum/vendor/symfony/console/Output/ConsoleSectionOutput.php:22 Stack trace: #0 {main} thrown in /opt/lampp/htdocs/forum/flarum/vendor/symfony/console/Output/ConsoleSectionOutput.php on line 22