Sims UI Broken
No mods/CC. Deleted the local thumb cache. Uninstalled the sims, reinstalled. Repaired through the EA app. Still broken.
Forum Discussion
dzialkreatywny Don't jump between saves. We know the game doesn't dump all info between saves, so of course you're risking transferring corruption from the first save to the second. When you want to test a new save or sim, quit to desktop and reload.
Beyond that, please test fresh sims (not from the Gallery or your own library), and if any of them break the game, test in a clean user folder. As in, remove or rename the Sims 4 folder in Documents > Electronic Arts so the game creates a new one with no content.
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