What if the xbox included in win10 system cannot open Microsoft Store

I would personally try troubleshooting through multiple steps,

1. Checking for updates on your PC

2. Checking for updates in the windows store for the Xbox app

3. Restarting your computer

4.uninstalling the Xbox app and reinstalling it may work

(I believe that is your question - that the xbox app specifically wont work)

Have you tried resetting the Windows Store app? Here's how.

1. Press the Win+R keys to open the Run dialog.

2. Type WSReset.exe, and click/tap on
OK.

Error is showing while trying to download xbox app from internet (not from microsoft store).

Im using win10.

Hello KadenJones!

Unfortunately you cant, because microsfot gift cards are only for use in the microsoft/xbox store. (win10 or xbox)

Hope it helps!

Forza cannot be opened anymore (the error popup window redirects to the ms-store which forza cannot be opened from either), and the xbox launcher won't launch. Microsoft Store looking for updates runs forever.

UPDATE:
I reinstalled Xbox GameServices and now the game starts again with the error code 0x12c as before