Here are the steps i did to fix the error.

• Paste the following line of code into PowerShell with administrator

​

net localgroup Administrators XboxTest /add

• if the powershell says "The command completed successfully." thats what we want.
• this will create a new user on your computer.
• now log out of the xbox and microsoft store apps.
• if you press windows key + L. that will lock your computer
• if the previous step didnt lock your computer, press windows key then click the power button and press the option "Lock".
• once you "sign in" to the "xboxtest" user open microsoft store and xbox and log into those.
• go back to your other user, and log into microsoft store and xbox there.
• the error shouldnt appear anymore and you can safely delete the other user.
• to delete the other user go to the settings app -> accounts -> other users. you should see a user name xboxtest, go ahead and remove it.
• once removed everything should be back to normal.

Hope this helps!