springcloud gateway feign调用 异常问题： feign.codec.DecodeException/feign.codec.EncodeException

@Configuration
public class FeignConfig {

    @Bean
    public Decoder feignDecoder() {
        return new ResponseEntityDecoder(new SpringDecoder(feignHttpMessageConverter()));
    }

    @Bean
    public Encoder feignEncoder() {
        return new SpringEncoder(feignHttpMessageConverter());
    }

    public ObjectFactory feignHttpMessageConverter() {
        final HttpMessageConverters httpMessageConverters = new HttpMessageConverters(new GateWayMappingJackson2HttpMessageConverter());
        return () -> httpMessageConverters;
    }

    public class GateWayMappingJackson2HttpMessageConverter extends MappingJackson2HttpMessageConverter {
        GateWayMappingJackson2HttpMessageConverter(){
            List mediaTypes = new ArrayList<>();
            mediaTypes.add(MediaType.valueOf(MediaType.TEXT_HTML_VALUE + ";charset=UTF-8"));
            setSupportedMediaTypes(mediaTypes);
        }
    }
}

@FeignClient(value = "redis-server", fallbackFactory = RedisFeignCallback.class, configuration = FeignConfig.class)
public interface RedisFeign {

}