Mturk Code generator not working.

As far as I can tell I have followed the instructions on this website: https://medium.com/@jlroo/integrating-a-qualtrics-survey-with-amazon-mechanical-turk-561cdeebe239

but for some reason the validation code isn't being generated at the end. I got a bunch of angry messages from people on mturk saying it wasn't working. I think the issue lies in the "set embedded data" step in the web service block. You can see how mine (on the left) looks different than theirs (on the right). How do I get that little green "ed" thing to show up?

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Here's the link to my survey: https://umich.qualtrics.com/jfe/form/SV_6fcPNW9Q7NZLMFv