Fatal error: Uncaught Error: Class "Symfony\Component\HttpKernel\DataCollector\DataCollector" not found in I:\www\frameworks\Symfony\doctrine\vendor\symfony\security-bundle\DataCollector\SecurityDataCollector.php:38 Stack trace: #0 {main} thrown in I:\www\frameworks\Symfony\doctrine\vendor\symfony\security-bundle\DataCollector\SecurityDataCollector.php on line 38