Featured Image Won’t Display

I installed the Infinite Scrolling Plugin. The initial 10 posts all load fine, however, the next posts to load using infinite scroll are missing the featured images. When I look at the code, it appears the link to the featured image is there but the picture does not display. I made a clone of my website so I could test a few plugins. Could the clone environment be causing the featured images not to display or is there another issue?

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