Syntax Error with Multivariate Test

[#1]

I'm having trouble getting a MVT to render at all. I have gone through all the support forums and followed the examples to no avail. 

The error is 

Uncaught Error: Syntax error, unrecognized expression: .site-header\\`

I can force the changes with the code snippet via the console. But i cannot get a forced experiment to load either.

Any idea?

[#2]

@danespreedly- It looks like you have some invalid JavaScript in there, or maybe just a missing semi-colon.  Can you post your entire script block from the editor?