Fatal error: Uncaught Error: Interface "JMS\Serializer\Handler\SubscribingHandlerInterface" not found in /var/www/html/src/vendor/jms/serializer/src/Handler/ConstraintViolationHandler.php:18 Stack trace: #0 {main} thrown in /var/www/html/src/vendor/jms/serializer/src/Handler/ConstraintViolationHandler.php on line 18