Fatal error: Uncaught Error: Interface "Symfony\Component\Serializer\Normalizer\NormalizerInterface" not found in I:\www\frameworks\Symfony\doctrine\vendor\symfony\serializer\Normalizer\BackedEnumNormalizer.php:23 Stack trace: #0 {main} thrown in I:\www\frameworks\Symfony\doctrine\vendor\symfony\serializer\Normalizer\BackedEnumNormalizer.php on line 23