Just send me your save and I'll place it in my game and manage to figure out what's wrong. (Trust me, I've finished this game 4 times already!)
You'll find it either within the game's folders in "game's folder\game\saves"
Or in %appdata%/Roaming/Avatar-Harem-"Lots of Numbers". (Idk for Linux/Mac)
Now you may be asking:
"I have so many saves, How do I know which one is the one I need to send?"
You'll find your latest by either being aware of the name or it's creation history since the game shows up the save file's history too.
It IS the other way around yes.....damnit...
Also idk my guy.
I just assumed that that may be the problem out of random guessing for the solution.
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And I turned out to be wrong lol.
Unless OP runs the 64-bit version on a 32-bit OS.....