Hello, if you have a problem with Unknown Horizons you are in the correct place to get help and solve your problem.
The FIFE version of Unknown Horizons is no longer supported. You can try to ask help about crashes, but it is unlikely that we can do anything about it.
We are working on a Godot version, but this is not playable yet.
Leave a bugreport on our Bug Tracker at Github. Keep in mind that this version of Unknown Horizons is not supported anymore (we don' have developers for this) so we probably won't be able to fix it.