Trying Demo in Tester results in Error

I'm trying to debug a 80Legs app using the tester at: http://80apptester.80legs.com/ and am getting the error TypeError: EightyAppBase is not a constructor.

As a sanity check, I tried with a demo app from the github repo: https://raw.githubusercontent.com/datafiniti/EightyApps/master/apps/LinkCollector.js

Using this demo I am receiving the same error. Is the Testing app not up to date with the spider runner?

Scott