That's what decides how big a unit actually is, for pathfinding purposes (such as if it can walk between trees or buildings that are close together). Default is regular unit size, large is used by siege machines and war elephants, and then there's several naval classes.

What does this do:  <PassabilityClass>     default   </PassabilityClass> It was in the unitmotion in https://docs.wildfiregames.com/entity-docs/r28/components/unitmotion/?h=

interestinglog.html Yes, I did update from git

did you update from git? that was an issue a little while ago. But should have been fixed, I don't have the issue anymore. Also I usually use the "interestinglog.html" file to figure it out.

I tried other maps, and they loaded, I think I played them in an older version of the mod, I also tried creating a map, and it worked, so maybe it was something with that map?  Also, I remember there was an error when saving a map one time (it was after I had won), and it wouldn't save