Facebook share preview not showing Image, Title and URL

Hello,

I’m facing the same issue on my site https://www.whatagag.com
When sharing a post, neither the post title, or URL or image is being shown in the sharing preview.

When I view source, all the og tags (title, url and image) are present so no miss on that part.

But still when I try fetching scrape information from FB developer console, I get the error: Object at URL ‘https://www.whatagag.com/2017/06/28/pakistan-mein-mooli-ke-paraanthe-khane-ke-baad-hue-dhamaako-se/’ of type ‘website’ is invalid because a required property ‘og:title’ of type ‘string’ was not provided.

This is happening with all posts.

Can you please help.

Thanks