Facebook article preview: "Curl error" or "Could not resolve hostname"

Question

When I share my posts and articles from site to Facebook, it shows blank preview . Meanwhile, when I post to Twitter, there's no problem.

Since it is showing a blank preview, I decided to go to Facebook Debugger and paste my link there. Here what it says.

UPDATE: Curl error is gone. However, this one shows on debugger

Answer 1

if i understand your question correctly, you need to use

    <meta property="og:image" content="%%% />
    <meta property="og:title" content="%%%" />
    <meta property="og:description" content="%%%%" />
    <meta property="og:url" content="%%%%" />
etc

Its help to make good preview.