Other posts by this author thumbnails not showing

Hey Guys,

Still new to the theme, and learning. I am having a small problem. When viewing a listing on the premiumpress demo site I see the section in the author widget “Other posts by this author” with the small thumbnail of the listing, and title.

All I am seeing on my test site is just the title and not the thumbnail image. Is there a section I am missing to enable the thumbnail image beside the title?

First screenshot is of the demo site, and the second one is on my test site.

Appreciate your time, and any help or advice you can offer.