If I understand well, you got the link throught Patreon. If yes, what version you got and what kind of error are you getting when downloading it? Or it is just throught Itch?
I'm having the same issue, but it's not just Stronger Bonds. There is at least one other that does the same thing. Basically the version dropdown has nothing in it. I am using the itch app, BTW. Oh, and I can't download the PDF version, either.