Fatal error: Uncaught Error: Class "SebastianBergmann\Comparator\ObjectComparator" not found in I:\www\frameworks\Symfony\doctrine\vendor\sebastian\comparator\src\ExceptionComparator.php:17 Stack trace: #0 {main} thrown in I:\www\frameworks\Symfony\doctrine\vendor\sebastian\comparator\src\ExceptionComparator.php on line 17