If you already add the correct 2FA code and password but you still get this message
Your two-factor authentication was incorrect? Please try again.
Follow these steps to fix it:
1. Open your Google Authenticator App on your mobile phone
2. Tap hamburger (three stripes) menu on the left top
3. Select "Settings"
4. Sleect "Time correction for codes" and then "Sync Now"
5. Add again the code to the 2FA form on the 2FA Settings Page.