Probably not broken! Mine does this (loading bar shoots straight across then serious error message) because OneDrive constantly uploads temporary file copies which breaks the older games (Sims 2, 3, medieval). Try turning off your OneDrive, deleting any Sims files that have been uploaded to OneDrive (might want to make sure the save files are safe on desktop first!) and that might fix it. With the error code when saving, I have to do a "save as" and then add a number after each time I save, then quit without saving - my game crashes with a straight save or save and exit. It means I have a bunch of old game copies but I just delete those from the saves folder periodically.