Thanks Curtis,

As far as I know FB:Admins and FB:App_id is for if you have an entity on Facebook like page or app.
But I do not have such.
I just want to have a preview in a facebook post. What you suggest is that every website on the web has a FB:Admins and FB:App_id. I doubt it.
While I rarely find websites or links that do not generate preview on facebook post.

As I wrote earlier
http://services.bg/uslugi/domashni-u...-services.html link is generating preview.
http://services.bg/ is not generating preview.
So this has nothing to do with FB:Admins and FB:App_id
It is clearly a bug.