I can't get a community made engine made with 5.5 to work

I am trying to the Infinity Engine/Mugen Engine to work in 5.6, the current version I have of this community made engine is 5.5. Not only is it giving me the FFXFSR3Settings error but it is also refusing to open so I can’t even try to change the settings. I tried to get it to update engine project versions but it doesn’t ever seem to. If anyone could give me help it would mean a lot.