Hello reaver kin,
Welcome to Microsoft Q&A forum.
It seems to be a credentials cache issue on your case. Before we proceed, may I know if you have the same issue log in to any other Microsoft apps or games?
In the meantime, please try this quick fix.
- Type "Credentials Manager" in the search bar and press Enter.
- Find and remove any entries related to your account, Minecraft or Xbox.
- Restart the game and try to log in again.
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