Is anyone else seeing “Uncaught ReferenceError: _ is not defined”? It’s coming from the Jquery library file that is included by NB.

I can’t find any way to fix this. It has completely broken the site i’m working on!

I discovered that an iframe had been added to one of the template files for the side bar, and it had an improperly closed iframe element tag. This caused the browser to “guess” how to close the html.

I would hunt through all the code, and also look for visual weirdness on pages that have this issue. You should let Nationbuilder load the Jquery library for you, since they may be running code, that only works with their chosen version.