Fatal error: Uncaught Error: Class "Symfony\Component\HttpKernel\DataCollector\DataCollector" not found in D:\Application\www\Training\vendor\symfony\http-kernel\DataCollector\EventDataCollector.php:24 Stack trace: #0 {main} thrown in D:\Application\www\Training\vendor\symfony\http-kernel\DataCollector\EventDataCollector.php on line 24