A family of Microsoft spreadsheet software with tools for analyzing, charting, and communicating data.
If this problem occurs specifically with the Office apps, restart your PC and then run an Office repair. See https://support.microsoft.com/en-us/office/lifecycle/repair-an-office-application . An Online Repair is more thorough, but keep in mind that the last step requires a reinstall of Office. Therefore, before you begin, you should ensure that you can access your account at https://account.microsoft.com/services and that Office is associated with it.