Account Error, Fixme button does not work

Hi all! To utilise everything that Office 2016 has, I am moving from Standard Office 2016 to Office 2016 Pro Plus. At first, I was using apps smoothly enough. However, a few days later, I am experiencing Account Error, Fixme button does not work as well. What might have gone wrong during the transfer?

1.File>Account>under User Information, sign out all the existing account and exit all Office apps.

2.Control Panel>User Accounts>credential manager>Windows Credentials, remove all Office 365 credentials that look like: MicrosoftOfficeXXData:XXXXXXXXX

Also, you could use SARA Tool to troubleshoot on this kind of sign-in or activation issue.

Fix Outlook and Office 365 problems

Please let us know the result.

Please follow the below link