Sharing icons on post, not working properly

Hi,

After the installation of Newspaper Theme, I installed the default demo content that came along with the theme.
But the issue is, share icons are not working properly. Especially the share feature with facebook icon. When facebook share button is clicked, it just pulls in the domain name of my website to be shared, No image of post,heading of post, short content, or writer’s name is shared while sharing.
I tried sharing it by adding new post too. still issues persists.

Steps I took: Reformatted the WordPress installation several times thinking it may be a plugin issue. But currently I haven’t installed any plugins other than the plugins that came along with the Theme. So it is obvious that no plugin issues.

Need help!!!