Fatal error: Uncaught Error: Interface "Symfony\Component\Validator\ConstraintValidatorFactoryInterface" not found in I:\www\frameworks\Symfony\doctrine\vendor\symfony\validator\ConstraintValidatorFactory.php:25 Stack trace: #0 {main} thrown in I:\www\frameworks\Symfony\doctrine\vendor\symfony\validator\ConstraintValidatorFactory.php on line 25