@mrgothicfinn Did you try disabling OneDrive, as described in the post immediately above yours?
If that doesn't or didn't help, please create a new admin Windows account and try playing in that. Make it a local account, as in, don't sign into Microsoft, and don't sync with any other services you normally use. You'll be able to sign into Origin (if you play through Origin) and shouldn't need to redownload the game, but your saves and other user content won't be available. That can be addressed later; for now, just start a new save and let me know whether you get another Error 16.