A user who had exactly the same error as you (RuntimeError: maximum recursion depth exceeded in cmp),
shortening the path to the game's directory got rid of it. Why it didn't help you, I dont know, since I'm not a Python/RenPy expert. Since you don't have much to lose (your game won't run anyway, I guess), try shortening the path even further by making it, say, C:\GAMES\FashionBusiness-EP2.1-v16-FULL\
If this does not help and there is no one here who knows Python well and is able to analyze the code, then try to write to the developer (
DecentMonkey) via PM. If he has time in his busy schedule, maybe he can help you.