Sims 4 error code 0 Will not save

I've had this happen to my game before. What helped me is doing a Sims 4 factory reset -

Move your Sims 4 folder [C:\Users\Username\Documents\Electronic Arts\Sims 4 Folder] to the desktop and try playing the game again, by going into Origin and click Play on Sims 4. This will create a new folder.

Try creating a new Sim in a new town and save it.

You won't loose any of your saves, Sims, houses etc. from your folder, as you'll have it backed up to desktop.

More tips can be found in this article from Crinrict.

Save game was saved with an newer version
https://sims4.crinrict.com/en/2014/09/save-game-was-saved-with-an-earlier-version/