Featured Image not showing on post content page

The featured image on my site is not showing after pressing the more button on the blog post. I am running the heuman theme, and the image would show when I was on mustang lite and as soon as I switched to heuman. Problem started after I had disabled most plugins and re-enabled them to fix yoast seo. The image won’t show even on old posts
this is my site:
I go back and set all individual posts to image type, and other users are pointing out problems with this approach