@poppypoppyy I've split your post into its own thread, as the other thread was several years old.
Please move your entire Sims 4 folder out of Documetns\Electronic Arts and onto your desktop. When you launch the game, a clean folder will be created with no content. Start a new save and see whether you can edit a sim's face normally. If not, please describe what happens when you try.
If you can edit faces normally, you can move the contents of the Saves and Tray folders from your old Sims 4 folder to the new one, and go back to playing. If you do want to use mods and cc again though, it's a good idea to test them first in the clean folder before playing forward with them. It's entirely possible that one or more outdated files caused this issue, and they'll likely cause it again if you reinstall the wrong ones.