Featured images are not showing up on blog posts and when shared.

My website is http://garylott.lifesbeatenpath.com/

In the past few months I've had some support help - which was great by the way - and the problems were fixed. I had issues with author boxes and social sharing icons showing up all over the page instead of just after a post. Those were here:

https://premium.wpmudev.org/forums/topic/on-panino-theme-the-social-share-buttons-are-showing-up-all-over-the-page#post-990697

https://premium.wpmudev.org/forums/topic/i-am-using-starbox-for-my-authors-on-blog-posts-and-boxes-are-showing-up-all-over-the-page#post-977845

Now, the featured image does not show up on the blog post. Even though I've set a featured image and you can see it there, it does not show up on the post. Also, when sharing to social media the featured image does not show up. I have Yoast SEO which enables you to set your own featured image and description and even those don't show up.

Help... again!

Thank you
Billie Hiser