My understanding is the GOG version is effectively the same as the Patreon version, so I'm not sure where else one could get a copy; the pirated copies like the one here are ultimately from Patreon.
Just to double check, did you save the game when prompted to at the end of Episode 8? You need a special save to import in Season 3, not a normal save from the end of the episode. It should look something like this:
View attachment 2145643
If you haven't saved the game at this screen, try that and see it if works. If you've already done that and still can't import it, then I'd guess it's probably something to do with whatever 'cheats' you have.