Facebook thumbnail image issue

We have created the post “https://thinkdifferentlybiblestudy.org/theprideoflife/” and shared in the Facebook post.

after posting the thumbnail image is not showing.

We have checked in the facebook developer tool “https://developers.facebook.com/tools/debug/” the same error exist.

could you please help me to fix the issue.

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