911 Custom widget areas not displaying suddenly

Hi there,

All of a sudden my custom widget areas no longer display on www.havendesignstudio.co.
I have several custom widget areas set up for the logo image and navigation bar, and the footer. They were working correctly when I set everything up (couple of months ago), but all of a sudden they no longer appear. I have been on the phone with my host for over an hour and they have exhausted any possibilities for what's causing the error on their end. I have disabled and enabled plugins one by one, and nothing is working to make the widgets appear. Has anyone had a similar problem? Any help would be greatly appreciated!