We are trying to get "user_friends" permission from Facebook to create more social environment to our Unity game. When we try to get user friends from any of our personal accounts there is no problem, PlayFab is getting our friends and fetching perfectly but when we try to get Facebook test user's friends which we created from Facebook Developer dashboard PlayFab is failing and returning Error: "/Client/GetFriendsList: An unknown error has occurred." since error telling there is an unknown error we can't able to locate where is the issue exactly. Any help would be appreciated, thanks...