Glip Compliance Export in C#

https://github.com/ringcentral/RingCentral.Net/blob/master/samples.md#create-data-export-task

RingCentral.Net is the new RingCentral SDK to replace ringcentral-csharp-client. We are going to announce it next week.  Please have a try: https://www.nuget.org/packages/RingCentral.Net/

I follow you and I get taskId and archiveId. But when I using Rc.Restapi().Glip().DataExport(taskId).Archive(archiveId).Get() I receive error:

Response:
StatusCode: 404, ReasonPhrase: 'Not Found', Version: 1.1, Content: System.Net.Http.StreamContent, Headers:
{
  Connection: keep-alive
  RoutingKey: SJC11P01
  RCRequestId: 8ade8990-3caf-11e9-9acd-005056bba449
  Date: Sat, 02 Mar 2019 05:53:45 GMT
  Server: nginx
  Content-Length: 83
  Content-Type: application/json
}
Content: {
  "errorCode" : "AGW-404",
  "message" : "Resource not found",
  "errors" : [ ]
}

Request:
Method: GET, RequestUri: 'https://platform.devtest.ringcentral.com/restapi/v1.0/glip/data-export/238074004-238074004-486026144...', Version: 1.1, Content: <null>, Headers:
{
  User-Agent: RingCentral.Net
  Authorization: Bearer U0pDMTFQMDFQQVMwMHxBQURiejVrdDM5blBqZ19TLVhhTkFOM1VpZ0N3RGRWMVhjdzBzQzZFYlFZVEtFbnBGTk95cFFWUVQ3ZjB1em9ZVWdSNF9QWWRPMEVYNEhPV3FzbEwwTUtuOTJiWmRXWlJvTkk4RWFEc3FFZ0lVQmgzY3pudlk1OWFBbWVIcmFfcmdxaDdhQ0I5Z3h4WXhuV3ZhcUZpUW1vV2dYbkRfUlFVSmR4eTd2U25rWDM3aXRJdWQ4dnU2dlFab1Zibk5Na0JfOFBrcTVKMHBheFR5N2JSdmNKRHVkWEd8anA2YzNnfElMUnEzZHl0SURsLWJPb3VoQWV1Y3d8QUE
}

I check on the status of an Export Task, I receive "Completed" status. Why message is "Resourcec not found" ?