Visual Composer Closing Down

Hey

I’m trying to use the visual composer plug in on a website someone else has created with the7 theme.

I can add posts and pages etc, however when I click on the back end editor and then go to edit a section on a page, the visual composer box to edit this opens but for only about a second or two.

Can anyone shed any light on why this may be?

You should contact theme’s author for support