Fb share isn’t working

Hey,
I am working on this site. http://xyz.nestaway.com/
You can see the floating “Social Share” button, I have used this plugin called https://ww.wp.xz.cn/plugins/social-pug/.

Problem is.
When I share the post using Twitter it gives me proper URL and the site name.
Like this: The Ease of Settling in Survey http://xyz.nestaway.com/

When I share the same post using FB,
It fetches like only “Survey”(not entire page/post title) with the broken thumbnail.
Could you please help me fix this issues? http://imgur.com/a/NKHw4
I did ask the plugin author, but no luck they didn’t respond to it.

Please let me know.