A family of Microsoft spreadsheet software with tools for analyzing, charting, and communicating data.
If clicking the 'Repair Now' button does not resolve the problem, that performs a quick repair, that rarely resolves the problem, the best option is to perform a full online repair, this process basically reinstalls Office, please ensure you are connected to the Internet while the process is running.
Before performing this process, please log into your Microsoft account on this link (https://account.microsoft.com/services/) and check to ensure your Office licence or Microsoft 365 subscription is listed correctly on your account.
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.