Tutorial files won't load

I'm trying to load the tutorial files but they seem to be empty, there are no objects in the scene or not even an environment. I am on the Beta version of Aero. Wht's going wrong? The on given on this page is an example: https://helpx.adobe.com/uk/aero/how-to/tour-the-workspace.html?playlistPath=/services/playlist.helpx/products:SG_ADOBEAERO/playlist:topic/learn-path:key-techniques/set-header:guides/en_GB.json