Fatal error: Uncaught Error: Class "ApiPlatform\Serializer\AbstractConstraintViolationListNormalizer" not found in /home/wizilen/www/vendor/api-platform/serializer/ConstraintViolationListNormalizer.php:25 Stack trace: #0 {main} thrown in /home/wizilen/www/vendor/api-platform/serializer/ConstraintViolationListNormalizer.php on line 25