This kind of error can occur from an incompatibility with prototype.js and the Analytics Extension & Deployment within Launch. If someone can chime in and say why there incompatibility exists, that'd be great - I have not been able to identify where the issue is other than the fact that some prototype.js versions cause problems on some sites. (I have not confirmed that using the latest prototype.js fixes all issues or not, so that's an open question as well)
It looks like you've got prototype.js included, so as a first step I would try to update or remove that. Using requestly, I was able to block prototype.js from loading, and your Launch implementation was able to successfully complete all actions and send the Analytics beacon.
I see that you have cookie Domain Periods and First Party Domain Periods set to "3" in the configuration of your Adobe Analytics Extension. That does not match up with this hostname. Try removing those settings.
I got this far by loading the un-minified Launch embed on your site. The issue is coming from a call to a function by the name "onlyUnique" which is called when preparing s.linkTrackVars prior to sending the beacon.
I see that your AA library is really old (H.24 in fact). I'd be pretty surprised if anything other than AppMeasurement is certified for use with Launch. I would look at moving to AppMeasurment before doing anything else.