Hustle does not display in some browsers

On my site - I am trying to implement the Hustle plugin. I have it on the page - the slide in shows up fine, but the one near the bottom of the page (to the left of the video) only displays in Safari. No show on Chrome or Firefox on the Mac, or on Safari or Microsoft Edge in Windows 10. Ok on my iPhone.

Any ideas? I would like to use this plugin, but will have to ditch it if it does not work.

Randy Shannon