Are you using an older save? I found that the voices and sounds didn't work when I loaded a save that was made in an older version. What worked for me was making a new save while playing the new version and then reloading. To be more clear, you don't have to start from scratch (or at least I didn't); just load the old save, then go to the menu while playing and make a new save. Restart the game, load the newly created save, and the sounds work (again, this at least worked for me - no guarantees for everyone else).
Also, I thought I'd read that the creator explicitly said that they didn't want anyone publicly sharing anything that was locked behind a paywall, so I tried to be sneaky in my last post. Not a single person messaged me. Might've been a little too sneaky.