So i just installed Sims 3 Late Night. I was very excited to play it and couldn't wait any longer, but heart sinks as i see this "Unknown Error Occurred". I have four other expansions (Pets, Generations, Showtime and Seasons) and one stuff pack (High End Loft). I've studied on this "unknown error" for days now and nothing has happened. So I beg anyone for advice to fix this!
(I'm using a MAC by the way)