Functionality broken after update from 1.5.6 to 1.5.7

Just updated our site and now get a major error that prevents popup content from displaying. The error says:

“The requested content cannot be loaded. Please try again later.”

After reverting to 1.5.6 the error disappeared.

The page is http://eiglaw.com/our-firm/the-team/

We are using the plugin to create popup content for the sidebar images and the Team links in the main page content.

Any ideas?

Thank you!

https://wordpress.org/plugins/easy-fancybox/