Streaming resolution issue to Facebook

How do I adjust the resolution to Facebook from ATEM Mini Pro? I'm live streaming to Facebook via ATEM Mini and adjusted the streaming.xml file as per the requirement mentioned in Facebook. Screenshot of the error is attached.

I don't believe the ATEM can change its output resolution, regardless of the XML settings. Facebook will usually transcode the higher resolution into the 720p it wants; but having said that, I logged onto this forum with my own Facebook issues, so who knows?