Swagger Inspector - Wrong response structure in generated OAS

Hello,

I tried to generate an OpenAPI specification using Swagger Inspector with a test API. However, it turned out the response body is missing. Instead of an actual object, it just says there is a string as a response body, which is not correct. Am I doing something wrong ?

You can see the request below, the answer I got, and what is generated in the spec:

Thanks a lot in advance for your answer !