Fatal error: Uncaught Error: Interface "Sonata\Form\Serializer\SerializerHandlerInterface" not found in /home/flighto/e-commerce/vendor/sonata-project/form-extensions/src/Serializer/BaseSerializerHandler.php:30 Stack trace: #0 {main} thrown in /home/flighto/e-commerce/vendor/sonata-project/form-extensions/src/Serializer/BaseSerializerHandler.php on line 30