A family of Microsoft word processing software products for creating web, email, and print documents.
What is the exact error message? Is it saying that the document needs repair or Word? You can use the Open and Repair option for a document.
If you are getting the message "Something went wrong..." with a Repair Now option, don't bother with that, as it just runs the Quick Repair, which will usually not fix the problem. Instead, perform a full online repair as instructed at https://support.office.com/en-us/article/repair-an-office-application-7821d4b6-7c1d-4205-aa0e-a6b40c5bb88b