Blank Page with Visual Composer Templates

Hey guys,

All aspects of the theme and the website seemed fine up until I decided to upgrade Visual Composer and activate the license.
Upon activating the license for it and enabling features etc, when I use one of the downloaded templates, it makes the entire page blank.

In the editor, all the elements are still present, and I can edit them accordingly. But when I update or preview, it just shows an entirely blank white page.
This only happens with Visual Composer Templates. When I make the page myself without using any templates, then there’s no issue.

Unsure what the problem is.
Can anyone shed some light on this?
It’s a bit urgent for me. Thanks guys.

Ticket