Fatal error: Uncaught Error: Interface "JMS\Serializer\Handler\SubscribingHandlerInterface" not found in /home/flighto/e-commerce/vendor/sonata-project/form-extensions/src/Serializer/SerializerHandlerInterface.php:25 Stack trace: #0 {main} thrown in /home/flighto/e-commerce/vendor/sonata-project/form-extensions/src/Serializer/SerializerHandlerInterface.php on line 25