Gamegame000- Please try playing this save in an otherwise clean user folder. Move the entire Sims 4 folder out of Documents > Electronic Arts and onto your desktop. When you launch the game, a clean folder will spawn with no content. (Your saves and other content will be intact in the folder you've moved but temporarily unread by the game.) Don't add anything to the new folder yet; just start a new save and make sure it works.
If everything is fine, copy over your old save and see whether you get the same error. If you do, look for a new lastexception.
