No se muestra la imagen en Facebook

Hey, thanks for this fantastic plug-in.

I have installed it and connected my Facebook account, everything seems to be fine except for a small detail, the posts do not show the image of the post, a black background appears instead.

You can check it here:

https://www.facebook.com/Experto-PC-108495304223787

How can I fix it?

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