Facebook won't show my link preview of my article in my website; plus “Curl error: 56 (RECV_ERROR)”

[updicit3]

So I have a problem with my site. When I share my posts/articles from site to Facebook, it shows blank preivew

(meanwhile, when I post to Twitter, theres no a problem.)

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

Now i don't know what to do know. Its little hard to understand this one so can you help me? Thanks!

 

[updicit3]

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

 

[spacresx]

sorry i dont use facebook or twitter but wouldn't the
messages be kind of self explanatory regarding the problem ?

it would seem you do not have the correct/needed information
for the feed/link to work properly.

 

[updicit3]

sorry i dont use facebook or twitter but wouldn't the
messages be kind of self explanatory regarding the problem ?

it would seem you do not have the correct/needed information
for the feed/link to work properly.

I'm not techy so I really don't understand this errors.