No Type defined for Additional Property class Schema

Description

The type "ProblemDetails" is missing from the generated code: the generate command outputs an error 08:21:14.615 [Thread-1] ERROR i.s.c.v.g.DefaultCodegenConfig - No Type defined for Additional Property class Schema and the struct ProblemDetails is not generated.
Thus, the generated code does not compile because, instead of using the type ProblemDetails, the code is using var v map[string]Object (which is undeclared).

The type ProblemDetails is automatically generated by swagger from an ASP.NET API with the following property: "additionalProperties": {}.
When updating the json to "additionalProperties": false, the problem is solved and the ProblemDetails type is correctly generated.

Is there a config or an option to fix this? Updating the json manually is not convenient

Swagger-codegen version

Docker image swaggerapi/swagger-codegen-cli-v3

Swagger declaration file content or url

https://gist.github.com/arnaud-tincelin/ac345ad7942ca81ce674c45a91ed6419

Command line used for generation

docker run --rm -v ${PWD}:/local swaggerapi/swagger-codegen-cli-v3 generate -i https://gist.githubusercontent.com/arnaud-tincelin/ac345ad7942ca81ce674c45a91ed6419/raw/c0e105cd688c97d8c02851d9e866a6dc8b9169a4/json -l go -o /local/pkg/swagger 

Start by reproducing the docker generate command with the linked gist and inspect how the Go generator handles "additionalProperties": {}. Done means the generated ProblemDetails type is present and the output compiles without the undeclared Object map type.