Hey jeffo12,
When I take a look at the console for the page I see a few errors (https://snag.gy/bVfzZu.jpg). Since our plugin relies heavily on javascript to work, any error can cause the feed to stop loading.
The error is most likely coming from a plugin or your theme. You can figure out which one might be causing the problem by deactivating your plugins and seeing if the feed starts working or switching to a default theme (like twenty fifteen) temporarily.
Once you figure out which plugin/theme is causing the problem you could try contacting the author to see if they have a fix for you.