Fatal error: Uncaught Error: Class 'Symfony\Component\Serializer\Exception\NotEncodableValueException' not found in C:\xampp\htdocs\plugins\Symfony\Component\Serializer\Exception\UnsupportedFormatException.php:17 Stack trace: #0 {main} thrown in C:\xampp\htdocs\plugins\Symfony\Component\Serializer\Exception\UnsupportedFormatException.php on line 17