I created a new save and the town is there. Maybe try that? Can you play it?
Yeah repair didn't fix my issue, I'm going to go ahead and open a seperate thread for the dupe error so I don't keep clogging your report...Sorry for the inconvience.
White Screen. Usually caused by tool. Please use this thread: https://answers.ea.com/t5/Game-and-Mod-CC-Issues/MOD-RELATED-Can-t-access-world-map-White-Screen/m-p/11674521
World appearing twice is a bug. please use this thread: https://answers.ea.com/t5/Bug-Reports/WORKAROUND-Maps-from-DLC-appearing-twice-on-Overview-page/m-p/11565374
Okay, so I run my sims game with ALOT of mods! How I fixed the issue with San Sequoa was this
1. Save my custom families to my library from the cas menu, and my custom homes.
2. Remove ALL my mods and cashe files.
3. repair game
4. Start new game with a new save using a random loaded sim and loaded into the map now that it showed up and save.
5. Close game after save. put my mods back in and update any mods Especially any by Tmex (TwistedMexi) like Better Build Buy (BBB), TOOL, or Create-A-World (CAW)
6. Start game back up on that new save and put all my lots and families back in from library and then I was able to pick back up and play. 🙂
I hope this info is able to help anyone else, and if you do not play with mods following steps 1, 2 (removing cashe files), 3, and 4 should help fix your game.
