Fatal error: Uncaught Error: Class "Symfony\Component\Validator\Constraints\AbstractComparisonValidator" not found in I:\www\frameworks\Symfony\doctrine\vendor\symfony\validator\Constraints\NotIdenticalToValidator.php:20 Stack trace: #0 {main} thrown in I:\www\frameworks\Symfony\doctrine\vendor\symfony\validator\Constraints\NotIdenticalToValidator.php on line 20