Copy and paste your Arcgis hub root URL next to 'let's go' button, then click 'enter' key or 'let's go' button
Arcgis Hub
https://transparentgov.net/json2tree/esri/online/hub.html
How to use
https://transparentgov.net/cleargov1/1157/how-to-explore-arcgis-hub-army-corps-of-engineers