Have you encountered the same crash on a new unmodded campaign?I followed the instructions precisely and the result is the same. Same weird pop up. I'll say that there is no crashes normally though, seems to only happen for the Enhanced Battle Mod.
Worth noting that after battles, I get multiple pop up windows for it. Different codes each time. Maybe its got something to do with the number of horses?
Not sure if its that much of a big deal, but I guess that's for you to determine.