Fatal error: Uncaught Error: Class "Symfony\Component\HttpKernel\DataCollector\DataCollector" not found in I:\www\picman\vendor\symfony\form\Extension\DataCollector\FormDataCollector.php:34 Stack trace: #0 {main} thrown in I:\www\picman\vendor\symfony\form\Extension\DataCollector\FormDataCollector.php on line 34