upendran

I had the same issue. Modified ApiClient.Mustache to add this ``` clientDefaultCodecsConfigurer.defaultCodecs().jackson2JsonEncoder(new Jackson2JsonEncoder(mapper, MediaType.APPLICATION_JSON, MediaType.APPLICATION_NDJSON)); clientDefaultCodecsConfigurer.defaultCodecs().jackson2JsonDecoder(new Jackson2JsonDecoder(mapper, MediaType.APPLICATION_JSON, MediaType.APPLICATION_NDJSON)); ```