Comments not showing after copying/migrating site

Hi Sayan,

I have been using this plugin for a website for quite some time and I works great. But I am having an issue after I copied/migrated the site to a different location.

I am seeing the comment count on the home page (posts page) but when I am on that post page, the comments are not shown, it gives 0 comments.

Could it have something to do with Facebook Application ID.Do I need to make a new one and if yes, how can I retrieve the old FB comments on those posts?

Thanks & regards!