Good Day Elfanlaw,
My name is Carlo, I am also using Windows 11 pc and community member like you. Let us work together to sort this out.
Here's the steps you can try
-Go to Settings
-Click System
-Click Troubleshoot then “additional troubleshooter
-Look for Windows Store Apps, click it and run the troubleshooter.
-Click Start type Powershell and run as administrator
-Copy and paste the command below and hit Enter.
Get-AppxPackage *Microsoft.WindowsStore* | Reset-AppxPackage
Once you enter that command restart your computer and check the Store.
I hope the information above helps. Please let me know how it goes.
Have a wonderful day ahead and stay safe.
Sincerely,
Carlo T.