When I paste the URL of a single post page from my site to my FB fan page it shows a default image and not the featured image I selected as the preview image.
When I paste that same URL in FB's debugger page it shows the image that I selected as the featured image as the og:image
How come the image I selected as the featured image doesn't show up as the preview image? How do I fix it so that it does?
Here is a sigle post page from my site: