Re: sims 4 control shift c not closing

The cheat console closes if you type ctrl-shift-c again or press ESC. If you mean that the grey overlay does not disappear then this is caused by outdated mods.

Move your Mods folder to the Desktop and delete localthumbcache.package. Then test the game.

If it works now check for updates to your Mods and CC. Add it back a little at a time while testing until you have found all that are broken.