A family of Microsoft word processing software products for creating web, email, and print documents.
In the meantime, I suggest trying an Online Repair to thoroughly repair any issues with the Office installation:
In the search bar, type Control Panel > Programs and Features > find Microsoft 365/Office > right-click it > select Change > then run Online Repair.
If the issue persists, please answer the following questions to help determine what may be causing the problem:
1. What changes did you make to your computer or subscription before the issue started?
2. Is this issue only occurring when you open Word, or does it also affect Excel and PowerPoint?