Yup, seems like b----red the thing up.
There are other results for the topic in searching but a lot does not seem to be the same. Cure as well.
Could try them : Search Term : Windows 11 Microsoft Store not opening error: ms-windows-store:PurgeCaches
https://www.google.com/search?client=firefox-b-d&q=Windows+11+Microsoft+Store+not+opening+error%3A+ms-windows-store%3APurgeCaches
Do to the nature of the Beast Porthos would probably be correct on the fix but who knows. So there is variations in the above to try.
The Install repair upgrade is worth a shot before having to succumb to drastic measures.
https://www.elevenforum.com/t/repair-install-windows-11-with-an-in-place-upgrade.418/
Though..nothing wrong with a reinstall : https://www.windowscentral.com/how-do-clean-install-windows-11
NOTE : Very vanilla info as no idea what the system make/model is o point you to stuff. :=}
Once Windows has been installed, you install the necessary drivers for the MB from the Support Page Chipset always done first, SATA, Video, Intel or / and followed by the lesser drivers with lots of rebooting. Then other hardware and then leave well alone, drivers should not be allowed to auto update from Microsoft Update, especially Video Drivers. Should never update any driver/s unless the new drivers are intended to resolve a specific issue that you are having, installing new drivers unnecessarily can actually cause you the very issues that any new drivers are intended to resolve and uninstalling the new drivers may not resolve the problem/s that installing the new drivers has caused.
Let us know how you are making out.