Just had this happen, the game would not age up whoever it was that was supposed to age up. Went into CAS to try and solve and when I exited, the game had set back to four days earlier and all progress was lost. This really bites! I'd send the save but, it's impossible to save when it happens and my game reset so far back I doubt if it would happen again. Somebody suggested going into manage worlds, well that option was also disabled as was opening the gallery, as if I wanted to do that. This has happened before, but usually the aging up happens quickly. Now I have to rebuild this house, grumble grumble! Jeez, it happened on Sunday and now my game says it's Wednesday. Wow, not too happy!
Edit: I've had this weird resetting back to an earlier time issue before without the aging up problem although it happens during a loading screen, usually when leaving an event. SO maybe the aging thing kicks in and then turns off because the game resets. Something else weird - tonight after my game reset, while the house had returned to it's former state, and my sim had lost all job promotions, the computer in the game had stayed, the one that you receive in the writing career for getting a promotion to level two. If the house had fully reset, then the computer should have also. Prior to getting that computer, my sim had been using the respecteron midrange computer. Weird.
I just noticed some other weird stuff and I think I'm just going to scrap this game and start new. I think a game repair is in order also and while the night is shot anyways, I'll check my drivers for updates. Not exactly how I had planned my evening.
Edit: And on a new game, I now have a vampire breaking in... Somewhere. And I have the same problem, cannot save, cannot go into build/buy, cannot go into the gallery and cannot go into manage worlds and I am definitely not going into CAS because I've been there, and while I did save this earlier, I am not going to lose progress because of somebody's lousy programming. I will just let it run as eventually that vampire is going to leave. Again, the save will not do any good as it was done before any vampire even showed up on any lot.