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