Error while installing worlds

RexyStorms​  The worlds that come with expansions aren't loading?  Is the other content from these packs loading?  If not, uncheck and re-check all the EPs and SPs in the launcher's Expansions & Stuff Packs tab.  Even if they're checked, the game may not be recognizing your selection.

If the other content from the packs is loading, it sounds like you've broken your install.  I guess it's possible a mod could do this, but I haven't heard of one that has this effect.  Other than a mod, this wouldn't have anything to do with your Store installed content or your other user data; these worlds would be in the game's program files.  Have you changed anything there?  If so, repair the game (EA App > Sims 3 > Manage > Repair) and see whether the worlds show up again.