I built our site using X a long time ago and haven't updated it for a while. We have however been keeping our versions of WP updated, and we are currently on 4.8.1
Going into the site just now, I notice that the Visual Composer pane won't open on any of the pages. The version of VC currently activated is 4.3.1 and wonder whether we should have a more up to date version to make it work, or whether there's another reason why we're having this problem.
Hope you can help