I had this problem yesturday.

When I try to open UWP apps or UWP-based APIS additions(like Volume control, WIFI controller, battery checker, action control, Start menu...etc) it doesn't open
...

I think I will to upgrade by using french Iso.

Thanks although, I didn't want to upgrade by using french iso in first time because my internet is weak and it will take me at least 1 day but it...

EDIT: after testing that [CultureInfo]::InstalledUICulture in powershell, I found that it treats system language as Fr-FR and not EN-US, although I downloaded the language pack and display language,...

I downloaded an ISO for Windows 10 Creator Updates, however when I opened it first time, it didn't give me the first option "Keep my files and programs..." but instead only the last two options...