Fatal error: Uncaught Error: Class "Symfony\Component\Console\Output\BufferedOutput" not found in D:\Application\www\E-Tracking\vendor\symfony\console\Tests\Fixtures\DummyOutput.php:21 Stack trace: #0 {main} thrown in D:\Application\www\E-Tracking\vendor\symfony\console\Tests\Fixtures\DummyOutput.php on line 21