Hello there, Thank you very much for reaching out to us. I'm sorry to hear that you are having issues authenticating your Steam account. As it sounds like you may have attempted to unlink your Steam account from your Bungie.Net account, please note that if you had intended to do this, as of March 25th, 2025, it is no longer possible to unlink an account once it has been linked to your Bungie.Net account. While you can disable the Cross-Save function, you cannot remove the link to the account itself. You can read more about it [url=https://help.bungie.net/hc/en-us/articles/35597981889300-Notice-Bungie-net-Account-Unlinking-Update-on-March-25-2025]here[/url]. If you are trying to sign into the same Steam account you had linked previously and are seeing this error, please try clearing your browser cache/ cookies and using an incognito window to authenticate. Try also swapping browsers entirely, or using the Companion App to authenticate.