The error is:
Uncaught TypeError: Cannot call method 'getRootElement' of undefined
which is coming from line 724 of lp-core.js.
The page in question can be found at: https://app.unbounce.com/companies/41…
This doesn’t seem to happen on any of the other page variations, just this particular one. I can’t think of anything that was done differently one this variation which may have caused this.