Extension is missing for admin page

Hi,

I have an issue here, each of the links from the Extension on the admin page, eg: Modules, Shipping, Payments, Order Total & Product Feed does not return any results.
It just display " No Results "

Also, the template selection is also empty from the Settings.

May i know if there's anyone out there facing similliar issue before this?

Check if those files still exist in your folder.