Thesis theme not loading with fixedly

Hi,

I am using Thesis theme on my website and when I add fixedly media gallery on any page, the gallery as well as the theme both get disturbed. When I view source for the page it shows me only the content of that page, no header tags are there. Other pages are working fine. And also when I am logged in to admin, the page with gallery loads just fine and the gallery works also. But when I logout, the page again gets distorted. Please suggest what can I do to solve this issue and make the theme and fixedly work together.

Regards,
Rifat

https://www.ads-software.com/plugins/fixedly/