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

Hi,

I have recently purchased this game and a few expansion packs. Everytime, I try to play the game I get a pop up stating A serious error has occurred while loading 'townname.world' It is strongly recommended that you restart the application.

I have done that, un-installed and re-installed everything, rebooted my laptop, tried with/without expansion packs. Talked to the online chat and tried their fixes, but nothing's worked.

Please help.