Retrofit.responseBodyConverter无法将errorBody（）转换为自定义ResponseWrapper

Question

尝试将改造错误响应的errorBody（）转换为ResponseWrapper，如下所示：

retrofit.responseBodyConverter<ResponseWrapper<R>>(Failure::class.java, arrayOf(object : Annotation {}))
                        .convert(response.errorBody())

ResponseWrapper如下：

sealed class ResponseWrapper<R> {

data class Success<R>(val payload: R) : ResponseWrapper<R>()

data class Failure<R>(
        @field:Json(name = "code") val code: Int = INVALID_CODE,
        @field:Json(name = "status") val status: String = "",
        @field:Json(name = "exception") val exception: String = "",
        @field:Json(name = "message") val message: String = "",
        @field:Json(name = "fieldErrors") val fieldErrors: List<FieldError> = emptyList()
) : ResponseWrapper<R>()

class NotFound<R> : ResponseWrapper<R>()

class NoInternet<R> : ResponseWrapper<R>()

data class FieldError(
        @field:Json(name = "field") val field: String,
        @field:Json(name = "message") val message: String,
        @field:Json(name = "rejectValue") val rejectValue: String
) }

通过Retrofit / Moshi这样做，将产生如下错误消息：

java.lang.AbstractMethodError: abstract method "java.lang.Class java.lang.annotation.Annotation.annotationType()"
    at retrofit2.converter.moshi.MoshiConverterFactory.jsonAnnotations(MoshiConverterFactory.java:122)
    at retrofit2.converter.moshi.MoshiConverterFactory.responseBodyConverter(MoshiConverterFactory.java:91)
    at retrofit2.Retrofit.nextResponseBodyConverter(Retrofit.java:330)
    at retrofit2.Retrofit.responseBodyConverter(Retrofit.java:313)

我在这里错了什么？