At some point in the past week, I lost the ability to use the "Live Preview" to check out new themes.
I go to the dashboard to browse new themes periodically. But when I use "Live Preview" now, the content of my website only appears for a second in the theme I'm checking. Then, the content blanks out, with the exception of embedded Youtube videos. All of the content blanks - Title, posts, sidebar, menus, everything except Youtube videos. This happens when trying to preview all themes, including themes I was able to preview just fine a week or so ago.
The blog I need help with is zombiesymmetry.com.