When we click on an action, it "flashes", and the sim will not perform the action. No matter what you click on. Zoom and arrows work. The game was working fine earlier. They go about their automatic tasks.
Sorry for a late response. Try to patch the game.
It's probably a glitch in the game. If you are in story mode, your best bet is to start over. If you are in freelance mode, then you probably can't do anymore with that family.
Unfortunately, there isn't much to be done with one of the story series glitching and causing havoc.