A family of Microsoft word processing software products for creating web, email, and print documents.
1
Open Word.
At the top right of Word, log out of Office.
Restart (not shut down) your PC, then log back into Office, is your licence/subscription then recognized correctly.
2
If that does not resolve the problem, the best option is to perform a full online repair of your Office installation.
Open the Settings App (gear icon on your Start Menu)
Go to Apps - Installed Apps, then scroll down to find Microsoft Office
Select that and choose Modify - Online Repair
That should fix any issues with your Office Installation.