The WordPress version 4.5 release broke Visual Composer, or is it the other way around.
People who updated to WordPress version 4.5 experienced a lot of major issues surrounding the page layout. The pages made with Visual Composer was completely broken, ie noting was displayed on screen.
Other symptoms:
1. Check your console to see if you have any weird errors.
This issue is fixed in Visual Composer version 4.11.2 released on 13.04.2016
Solution:
1. If you have purchased the plugin directly from the vendor, you can update the plugin directly from the dashboard. 2. If the plugin was included with a theme you purchased. Ask the theme developer to update the plugin, and update your theme when it is released.
MORE INFO :Â https://wordpress.org/support/topic/read-this-first-wordpress-45-master-list?replies=5&view=all#post-8268201