I looked at above’s example. As it’s pulling in data via JS/AJAX/XHR, there’s no easy way to to use GET Request or HttpRetriever, instead you’ll need a full browser as provided via the Selenium Nodes. Please see this reply for an explanation:
Simply way to detect this:
Disable JS in your web browser and try loading the page. If the desired content does not show up, you’ll need “real” web browser as provided e.g. via Selenium Nodes.