Disable Swagger on prod results in "Serialization for the format html is not supported"

Hey,

I changed the route for swagger_ui to /docs.

swagger_ui:
    path: /docs
    controller: api_platform.swagger.action.ui

On prod I disabled swagger:

api_platform:
    enable_swagger: false

However, when requesting /docs on prod I get an 500 with the following message:

[2018-10-18 13:31:21] request.CRITICAL: Uncaught PHP Exception Symfony\Component\Serializer\Exception\NotEncodableValueException: "Serialization for the format html is not supported" at /var/www/html/vendor/symfony/serializer/Serializer.php line 107 {"exception":"[object] (Symfony\\Component\\Serializer\\Exception\\NotEncodableValueException(code: 0): Serialization for the format html is not supported at /var/www/html/vendor/symfony/serializer/Serializer.php:107)"} []

Has anybody ever stumbled across it and knows how to get rid of that?

Best, Christian

[cve]

I have the same result even with enable_docs: false

[christiansiewert]

I also disabled docs on prod and it’s working now:

enable_docs: false