Please kindly note that here on Microsoft Q&A forum we mainly focus on questions about Teams for Business.
If only the personal account facing this issue, please consider posting in the corresponding Microsoft Community for better help.
Thanks for your understanding.
What is your account type? Please try checking the Teams web client for problems.
Are you logging in Teams via the default installed version of Teams (Teams for home or small business)?
If you also have issues with the Teams web client, contact your admin to run the following run tests to diagnose the issue:
- Select the following button to populate the diagnostic in the Microsoft 365 admin center: Run Tests: Teams Sign-in
- In the Username or Email Address field, enter the email address of the user who's experiencing the Teams sign-in issue.
For more details about this error, you could refer to:
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