Fatal error: Uncaught Error: Interface "JMS\Serializer\Handler\SubscribingHandlerInterface" not found in /home/palabrebel/www/kimai/vendor/friendsofsymfony/rest-bundle/Serializer/Normalizer/FlattenExceptionHandler.php:28 Stack trace: #0 {main} thrown in /home/palabrebel/www/kimai/vendor/friendsofsymfony/rest-bundle/Serializer/Normalizer/FlattenExceptionHandler.php on line 28