Thumbnails not loading into Media area, or into Archives

I was told by my hosting support that my Theme (Comic Panel) might be preventing the use of my thumbnails in comic Easel, my child theme. I have used a regenerate thumbnails pluggin to remedy this, but images still do not show up in my archives when clicking on a chapter link, (https://tantricseries.com/chapter/anatomy-of-the-dragon/) and they do not display in media beneath the header Thumbnails.

Could some one help me understand how to fix this? Do I need to add some code to Archive.php, or are there settings in Comic Panel that might need to be made.

Any help with this would greatly be appreciated.

The page I need help with: [log in to see the link]