Hi, I'm Bernard, a fellow Windows user. I'm happy to help!
Is there any particular error message or code? If none, I recommend following the steps provided by Q&A Assist. If the issue persists, I recommend reinstalling Office:
Press the Windows key + R, then type in:
appwiz.cpl
Then hit OK
Look for the Microsoft Office or Microsoft 365 app > Right-click, then select Uninstall
Follow the prompts to uninstall your Office app.
Then reinstall your Office app by following the steps from the link below: