Hello Jakub Pendrakowski,
Welcome to Microsoft Q&A forum.
May I know if the AI assistant suggestion helps you? If possible, may I know the results?
In the meantime, here is a fix you can try.
- Type "Credentials Manager" in the search bar and press Enter
- Select "Windows Credentials"
- Remove all entries contains Xbl or your Microsoft Account.
- Restart the computer.
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