Unity: Send HTTPS request from hololens

Hi guys,
Using Unity, I am developing a Hololens app that sends HTTPS Get/Post requests to Google Drive.

Through Google Search, I know that UnityWebRequest is one of recommended solutions. And I have tried to use that UnityWebRequest. I am able to send HTTP Get Request successfully, but I am fail with HTTPS Get Request even though I check all permissions in the Unity's publish settings.

Could somebody please instruct me how to send HTTPS requests in Hololens?

Thanks!