[Current Issue] Sims 3 "serious error" when loading save

AstraForest96  What exactly do you mean?  If you can select a world or save (which one) but can't load it, do you get an error, and what does it say?  Or is it that you can't see your saves at all, or the worlds you expect to see aren't available in a new save?

Please also post a screenshot or two if you think it might help.