I just upgraded my wordpress version to 4.5.1, suddenly visual composer plugin is not working, the code is showing perfectly but visual tab is just blank, whenever try to edit, it just processing and processing
Solution: 1. Deactivate all plugins and switch to default theme 2014, clear browsers cache, NOW…check is your visual composer plugin is working, if it will not….
There is two way out:
1. You have to check with plugins helpline, if you dont have a genuine copy of this plugin, then you have to purchase it
2. Just Switch your wordpress to older version, it will definitely work and your visual composer plugin will work perfectly
How to degrade wordpress to an older version : you can check here How to down grade wordpress to an older version?