Problem with the Event Visualizer

I setup Heap several weeks ago and initially everything worked as expected including the Event Visualizer.

Recently however, I’ve been encountering an issue with the Event Visualizer where when I click on an element, the definition box that pops up will get stuck loading and can’t be closed out. So it’s been impossible to create new events or repair prior ones.

Has anyone encountered this before or have any suggestions? I’ve tried different browsers, disabling ad-blocker, clearing the browser. I submitted a support ticket but I’m on the free plan so I’m not sure if/when that will get answered. 

Thanks