Fatal error: Uncaught Error: Class "Symfony\Component\Serializer\Exception\UnexpectedValueException" not found in I:\www\frameworks\Symfony\doctrine\vendor\symfony\serializer\Exception\PartialDenormalizationException.php:17 Stack trace: #0 {main} thrown in I:\www\frameworks\Symfony\doctrine\vendor\symfony\serializer\Exception\PartialDenormalizationException.php on line 17