App Store is recommended that you try to clean up the cache to see if you can return to normal:
Press "Win + R" key in the Run window, type WSReset.exe and click "Run."
If the problem persists, we recommend that you try the following program to redeploy your app store:
Enter the following command: "Windows Powershell Administrator" window that opens:
get-appxpackage *store* | remove-Appxpackage
Install it again:
add-appxpackage -register "C:\Program Files\WindowsApps\*Store*\AppxManifest.xml" -disabledevelopmentmode