Thank you for clarifying, RoMrs. O. May I know if you can still open your files via the Word online version? To check, go to www.office.com, then try accessing your files. If you are able to access them without any issues, it might be that there's something wrong with your application. Since none of the suggested troubleshooting steps have worked, I recommend reinstalling your Office. I will provide you with the steps below.
Follow the steps on this link to uninstall Office, you must select the correct version of Mac you are using to proceed. Link: https://support.microsoft.com/office/eefa1199-5b58-43af-8a3d-b73dc1a8cae3
After you have completely removed Office, follow the steps below to install the correct version:
- Go to www.office.com and select Sign In if you are not already signed in.
- Sign in with the account you associated with this version of Microsoft 365 or Office. This account can be a Microsoft account or a work or school account. Make sure you're using the account you used when you purchased Office.
- Once signed in, from the Microsoft 365 home page, select Install Office to start the download.
- When the download is complete, open the Finder, go to Downloads, and double-click the Microsoft Office installer.pkg file (the name may vary slightly).
- On the first installation screen, select Continue to start the installation process.
- Review the software license agreement, then click Continue.
- Select Accept to accept the terms of the software license agreement.
- Choose how you want to install Microsoft 365 and click Continue.
- Review the disk space requirements or change the installation location, and then click Install.
- Enter your Mac login password if prompted, then click Install Software. (This is the password you use to log into your Mac.)
- The software will begin installing. Click Close when the installation is complete.
To activate:
- Click the Launchpad icon in the Dock to display all your apps.
- Click the Microsoft Word icon (or another Microsoft 365 or Office icon) in Launchpad.
- The News window opens automatically when you start Word. Click Get started to start the activation.
After you completed all the steps, kindly try to access again your Microsoft Word files and check if the issue was resolved.
For more detailed steps, you can refer to the link provided below:
https://support.microsoft.com/office/4414eaaf-0478-48be-9c42-23adc4716658#InstallSteps=Install_on_a_Mac