In the locker-room portion of the Willow Creek gym the walls separating the showers from the rest of the locker-room are missing. The doors are still there and the sims don't seem to get the embarras...
Ideas
Ah, that is a long lived bug. The most recent Laundry List addresses it:
https://forums.ea.com/discussions/the-sims-4-general-discussion-en/new-laundry-list-february-18-game-update-friday-228/11909808