Fatal error: Uncaught Error: Interface "Symfony\Component\Validator\Mapping\MetadataInterface" not found in I:\www\frameworks\Symfony\doctrine\vendor\symfony\validator\Mapping\ClassMetadataInterface.php:34 Stack trace: #0 {main} thrown in I:\www\frameworks\Symfony\doctrine\vendor\symfony\validator\Mapping\ClassMetadataInterface.php on line 34