Quite stumped. I Googled and did various things that people have told me to do, but nothing is working. I have several WordPress sites and whenever I try to post them on Facebook, no thumbnail image appears.
I’d like to add that in case there are no OG Meta tags on a site, Facebook tries to grab an image from the page. However, the page you list does not contain any images, at least not IMG tags — only background images, and Facebook ignores those for thumbnail gathering.