The notification " enemy hp is not defined" at the start of the first combat after returning with the wine.
I had the same problem, but I played the game on Linux. My solution was to add the game to Steam and launch it with the Proton Experimental compatibility layer. This worked for me.
Thank you! I will add this to the instructions.
I found the issue and updated the files. Please redownload (and don't forget the save folder.) :)Sorry for the trouble.