Run troubleshooter for Microsoft Store apps: Select the Start button > Settings > Update & Security > Troubleshoot > Windows Store Apps.
If you can't find Microsoft Store, see Trouble finding Microsoft Store in Windows 10.
If you're having trouble launching Microsoft Store, see Microsoft Store doesn't launch.
If you can launch the Microsoft Store but you are just having trouble finding or installing an app, see I can't find or install an app from Microsoft Store. ( https://support.microsoft.com/en-gb/help/4027498/microsoft-store-fix-problems-with-apps )