If you're getting "Permission denied" errors, try running "chmod +x /thepathto/Error143.sh", or if you're not using the terminal, right click the file > properties > permissions > allow executing file as program.
However, it's likely you'll get python module errors like "ModuleNotFoundError: No module named 'future')".
Either the game doesn't come with all the necessary libraries, or it does but for whatever reason can't find them.
It was easier for me to just import the game into Lutris and running the game with wine.
I don't know if this is an issue with linux versions of renpy games in general, or if it's specific to this game.