A family of Microsoft word processing software products for creating web, email, and print documents.
The best option if that 'Repair Now' quick repair option is not resolving the problem is to perform a full repair of your Office installation.
Open the Settings App (gear icon on your Start Menu)
Go to Apps, then scroll down to find Microsoft Office
Select that and choose Modify - Online Repair
That should fix any issues with your Office Installation.
If that does not resolve the problem, completely uninstall Office, restart (not shut down) the PC, then download and re-install Office form your Microsoft account on this link: