Fatal error: Uncaught Error: Class "Symfony\Component\Validator\ConstraintValidator" not found in I:\www\picman\vendor\symfony\doctrine-bridge\Validator\Constraints\UniqueEntityValidator.php:31 Stack trace: #0 {main} thrown in I:\www\picman\vendor\symfony\doctrine-bridge\Validator\Constraints\UniqueEntityValidator.php on line 31