'Unable to create call adapter for retrofit2.Response<...>

My Api:

@GET("/cinema/notShownMovies")
fun getNotShownMovies(
   @Query("token") token: String
): Response<GetMovieResponse>

Exception when trying to call API:

java.lang.IllegalArgumentException: Unable to create call adapter for retrofit2.Response<...data.GetMovieResponse> for method InstanceApi.getNotShownMovies Unable to create call adapter for retrofit2.Response<...data.GetMovieResponse> for method InstanceApi.getNotShownMovies

I don't know where to start. All other API calls work fine which is also defined in the same API class. Maybe a model error?

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Solution	Source

'Unable to create call adapter for retrofit2.Response<...>

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