Google search the app name: Define the problem using the correct terms and do a Google search to see if it is a common problem and find a solution

Update all apps: Open the Microsoft Store click on Library ❯ Get updates and wait for it to update

Restart the app: Close the app window then open the app from the Taskbar or via a search in the Start menu

Restart the computer to turn it off then on and close all apps: Open the Start Menu (Windows button or Windows key), click on the Power icon and click on ‘Restart’

Uninstall and reinstall: the app in Settings ❯ Apps ❯ select app and click ‘Uninstall’. Restart PC then download the app from a legitimate website and install. (N.B. If a software license is required sign into the relevant website account to download e.g. Norton).