Seems to be working under Linux with WINE 3.15
Not applied any of the fan made patches or town avi fixes.
Just the offline installer in a clean Windows 7 prefix.
Was able to reset the game state, create a party, enter buildings, exit the town and fight the bandits at least.
Perhaps in the future GOG will somehow be able to make use of
Proton (Wine) in order to solve issues like this.
Newer versions of Windows have no resemblance to old editions and the situation is bound to get worse with time.
Maybe we actually need Wine for Windows as ludicrous as that sounds.