Phoenix LiveDashboard hanging when trying to visit "metrics"

I’ve configured LiveDashboard successfully for my application and the dashboard seems to be working as expected but I’m running into an issue when trying to visit “metrics”. After clicking link the request seems to just hang endlessly resulting in this view:

I think I have metrics configured correct and as a matter of fact, all of the navigation links will cause the dashboard to hang. Has anyone had this issue? Maybe I missed something in the docs? Any help would be appreciated.

I’m also getting this error in the console:

Check your javascript console from the browser. One possible cause is the web socket connection somehow breaks.