Featured Image Won’t Display

I installed the infinite scrolling plug. The first 10 posts that load display fine. However, the next posts to load using infinite scroll are missing the featured image. I looked at the code and it appears the link to the images is there but the picture does not display. Is there a reason why the images won’t display. I cloned my website to test a few plugins. Could the clone environment be blocking the images or is this an issue with the plugin? Thanks.

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