Hi @Stephen Sayers ,
Welcome to Microsoft Q&A!
How did you sign in account?
Please try the following steps:
- Close all running VS instances.
- Update VS2019 to the latest version with Visual Studio Installer.
- Delete your browser history, cache and cookies.
- Delete all files of %localappdata%\.Identityservice.
- Relaunch Visual Studio and sign in account.
Sincerely,
Anna
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