Our shortcode is very flexible and it works with the wp-admin URL and it also works with custom wp-admin slugs.
But if you experience any issues, the best way to solve this problem is to use a relative URL instead of a full URL. For example:
Instead of using the shortcode [vg_display_admin_page page_url=”http://site.com/wp-admin/edit.php”] you would use [vg_display_admin_page page_url=”edit.php”].
Tip: The relative URL is usually the text that’s after wp-admin/