Fatal error: Uncaught Error: Class "Symfony\Component\Console\Output\StreamOutput" not found in D:\Apache24\www\project\Backstage\vendor\symfony\console\Output\ConsoleSectionOutput.php:22 Stack trace: #0 {main} thrown in D:\Apache24\www\project\Backstage\vendor\symfony\console\Output\ConsoleSectionOutput.php on line 22