I just updated to the 2.3 patch and my saved games from Riverview have none of the necessary community lots for gameplay, eg. the Truelong School, Military Base, Doo Peas Corporate Towers, City Hall etc. There's just an empty spot where all those items used to be, and when I checked the community items in build/edit mode they weren't available for placement.

I'm not having the same issue as many others here in that my Riverview saved games are working fine, and my Riverview town appears properly. It's just the rabbit hole community buildings that have vanished.

I've since tried uninstalling Riverview from the launcher and reinstalling it, and reinstalling the entire game. Neither of these have fixed the problem.

I then decided to find some third party Riverview community lots so I could just download and place them in my town- I then realized that no .sims3pack files that I installed show up in the game, even after uninstalling, redownloading, and reinstalling.