Server Down

katfink1​  There's a specific issue with some accounts that EA support can fix.  I don't know all the details, but it sounds like the other player had that issue and was able to find someone to address it.  But that doesn't mean that you have the issue.

If you start with a clean Sims 3 folder (remove or rename the old one in Documents > Electronic Arts), and you enable your expansion and stuff packs but do NOT install any Store or custom content, does the game work properly?  If so, try installing only one Store item and see whether it works.