Can’t log in to the Windows 10 app

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The "Couldn't Log In, Unhandled exception occurred during login" error message is related to a Credential Manager issue on your Windows 10 installation.

To resolve the issue:

  1. Go to the Windows Start menu.
  2. Type in "Services" and select the "Services" Desktop app.
  3. Right-click "Credential Manager" and Start or Restart your Credential Manager service.