| Q | A | ---------------- | ----- | Bug report? | yes | Feature request? | no | BC Break report? | no | RFC? | no | Symfony version | 3.3.10 FrameworkBundle assumes that `PropertyAccess` component is present https://github.com/symfony/symfony/blob/master/src/Symfony/Bundle/FrameworkBundle/DependencyInjection/FrameworkExtension.php#L139 We need to add it as a dependency or optionally register `serializer.normalizer.object` service