WPBakery Visual Composer not loading for Pages

hello team,

I have WP Bakery Visual Composer installed.
I am able to edit the products using Visual Composer.
While editing pages and posts, Visual composer is not opening up.
I will get the below link when I click on “Edit with Visual Composer” button
https://nrinstituteonline.com/wp-admin/post.php?vc_action=vc_inline&post_id=1460&post_type=page
this link is leading me to blank page.
Can you please help me as to what hte issue is and how to fix it

The page I need help with: [log in to see the link]