Hi,
I will walk through a few steps with you. Some of these are just to help figure out what is wrong, not to fix it right away. So if nothing changes after a step, that is normal. I will keep going until we solve it.
The following command would Reset and Reinstall Microsoft Store on your computer:
Press the Windows+R keys on the keyboard, or Right-click Start on the Taskbar and choose Run.
Type "WSRESET - i" without quotes.
Press Enter.
I look forward to hearing from you to get the results of the troubleshooting.