If you are having issues logging into your Activision account, whether it be for Call of Duty or Warzone, you may see the error 0 registration message. This usually happens when you try to register for an account using an email that is already linked to another Activision account. Don’t worry, there are a few simple steps you can follow to fix this issue.
Close the game and do a hard reset on your console or restart your PC. For Xbox users, hold the power button for 10 seconds.
Try logging in again using your Activision email and password. If that doesn’t work, try logging in via your network (PSN, Xbox, or Steam) or with your email and password through a web browser.
Make sure the account you want to use (Xbox, PSN, or Steam) is linked to your Activision account.
Once you’ve linked your account, try logging in again after restarting your console or PC.
If none of the above steps work, try resetting your password using the link provided. Follow the on-screen instructions, and then try logging in with your new password.
We hope these steps have helped you resolve your login issues. If you have any further questions about gaming, leave them in the comments below.