Try these
-Update Microsoft Store by clicking the Start button > Microsoft Store . Select See more... > Downloads and updates > Get updates.
If an update for Microsoft Store is available, it will start installing automatically.
-Repair and reset the app: Click the Start button > Settings > Apps > Apps & features. Select the app that's not working, and then select Advanced options. On the page that opens with information about the app, select Repair.
Some apps don't have this option, so if repairing the app doesn't fix the problem, select Reset.
-Uninstall and reinstall the app: click the Start button. In the list of apps, right-click the one that's not working, select Uninstall, and select Uninstall again to confirm. To reinstall the app, click the Start button > Microsoft Store > See more > My Library > Apps. Then select the app you want to reinstall, and select Install.
-Try running the troubleshooter for Microsoft Store apps. Click the Start button > Settings > Update & Security > Troubleshoot > Windows Store Apps.