A family of Microsoft word processing software products for creating web, email, and print documents.
Try the following: Restart your PC and then run an Online Repair. See https://support.microsoft.com/en-us/office/repair-an-office-application-7821d4b6-7c1d-4205-aa0e-a6b40c5bb88b .
Since an Online Repair usually requires a reinstall of Office, before you begin, check that you can access your Microsoft account at https://account.microsoft.com/services and that Office is associated with it.