A family of Microsoft word processing software products for creating web, email, and print documents.
That 'Repair Now' button just performs a quick repair of the Office apps and that rarely resolves the problem with Office.
The best option is to perform a full 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.