Hello Alan A,
Thanks for getting back to me.
If another Microsoft Account works well with the Microsoft Store and the Xbox apps, which means the issue is likely account cache or issue with the token broker of the account. I will see what I can do, in the meantime, please try to follow this quick fix.
- Resync the clock.
- Close all apps.
- Go to Settings > Time & Language > Date & Time.
- Make sure "Set time automatically" is Enabled.
- Select "Sync now" to resync the clock.
- Open the apps again.
- Reset the apps involved (Not just Microsoft Store).
- Go to Settings > App > Installed Apps.
- Click on the ellipsis next to the apps > Advanced Settings.
- Select Reset.
- Clear cache credentials tokens.
- Type "Credentials Manager" in the search bar and press Enter.
- Choose "Windows Credentials"
- Under "Generic Credentials" remove all entries that start or contain Xbl (short for Xbox Live)
- Restart your computer.
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