Fatal error: Uncaught Error: Interface "JMS\Serializer\Handler\SubscribingHandlerInterface" not found in /var/www/html/src/vendor/horstoeko/zugferd/src/jms/ZugferdTypesHandler.php:26 Stack trace: #0 {main} thrown in /var/www/html/src/vendor/horstoeko/zugferd/src/jms/ZugferdTypesHandler.php on line 26