Fatal error: Uncaught Error: Class "Symfony\Component\HttpKernel\DataCollector\RouterDataCollector" not found in I:\www\picman\vendor\symfony\framework-bundle\DataCollector\RouterDataCollector.php:23 Stack trace: #0 {main} thrown in I:\www\picman\vendor\symfony\framework-bundle\DataCollector\RouterDataCollector.php on line 23