Fatal error: Uncaught Error: Class "SebastianBergmann\Comparator\Comparator" not found in I:\www\frameworks\Symfony\doctrine\vendor\sebastian\comparator\src\ArrayComparator.php:26 Stack trace: #0 {main} thrown in I:\www\frameworks\Symfony\doctrine\vendor\sebastian\comparator\src\ArrayComparator.php on line 26