Fatal error: Uncaught Error: Class "SebastianBergmann\Comparator\ArrayComparator" not found in I:\www\frameworks\Symfony\doctrine\vendor\sebastian\comparator\src\ObjectComparator.php:21 Stack trace: #0 {main} thrown in I:\www\frameworks\Symfony\doctrine\vendor\sebastian\comparator\src\ObjectComparator.php on line 21