google-plus - Google API瞬間エラーGoogle.GoogleApiException

Question

Google API を使用していますモーメントを挿入しようとしましたが、エラーが発生しました: Google.GoogleApiException was unhandled Message=An Error occurred, but the error response could not be deserialized Source=Google.Api ServiceName=tasks

私のコード:

// サービスを作成します。

var service = new TasksService(new BaseClientService.Initializer()  
    {                 
        Authenticator = auth
    });
    TaskLists results = service.Tasklists.List().Execute();

//it's work fine


        Moment body = new Moment();
            ItemScope target = new ItemScope();
            target.Id = "replacewithuniqueforaddtarget";
            target.Image = "http://www.google.com/s2/static/images/GoogleyEyes.png";
            target.Type = "http://schemas.google.com/AddActivity";
            target.Description = "The description for the activity";
            target.Name = "An example of add activity";
            body.Target = target;
            body.Target.Url = "https://developers.google.com/+/web/snippet/examples/widget";
            body.Type = "http://schemas.google.com/AddActivity";

            MomentsResource.InsertRequest insert = new MomentsResource.InsertRequest(service, body, "me", MomentsResource.Collection.Vault);
            Moment wrote = insert.Execute(); //error here