The fact that you are getting an authentication error from Facebook likely indicates that the failure is happening on their side. Since you are connecting from a different country that normal there might be some security feature blocking your logjn. I web search produces several users facing similar issues.
Since this doesn't appear to be an Azure specific issue I would recommend reaching out to Facebook for support.
https://www.facebook.com/help/283100488694834/?helpref=hc_fnav
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