Question from a developer:
I have a player who keeps getting a Facebook API error. But he doesn't have Facebook linked to his account - he just signs in with Custom ID. So why is he hitting FacebookAPIError?
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If you're querying for Facebook data through PlayFab (trying to get Facebook friends in the GetFriends or GetFriendLeaderboard calls, for instance), but don't have a valid Facebook token for the user, that's going to cause an error.
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