A family of Microsoft word processing software products for creating web, email, and print documents.
Dear MARGARITA ISAZA,
Thank you for posting in Microsoft Community.
We understand you are encountering Word stuck issue on your Mac. As you mentioned the Office apps version you installed is 16.72, which is the newest version, so may we know your Mac (server) system version? The reason for the issue could be that your Mac Server version isn't compatible with your Office version.
Here is the article for Office for Mac supported macOS Upgrade macOS to continue receiving Microsoft 365 and Office for Mac updates - Microsoft Support
If your Mac system is not the supported one, please first update it. You can contact Apple support if you need more help on this topic.
After Mac system is updated, you may consider Uninstall Office for Mac - Microsoft Support and reinstall it if the same loading service persists.
Hope the above information helps, if your issue persists even after Office apps are reinstalled and the system is updated, please attach screenshots to us.
Thank you for your understanding and cooperation.
Best Regards,
Sophia