Hi,
Not sure why you were able to use Visual Composer inside the area because this has never been allowed since 7.0.0.
However, since 7.10.0, it can be allowed by using this code snippet.
Check our code snippets documentation if you don’t know where to place this.
function cuar_custom_disable_css_resets()
{
return true;
}
add_filter('cuar/private-content/view/disable-css-resets', 'cuar_custom_disable_css_resets');
This will disable our forced resets on CSS styles. It means that some graphical issues may appear in the area, especially if you have a theme or plugins using Bootstrap CSS, however, you should be able to use Visual Composer.
Best regards.