I saw that just a few days ago someone has exactly the same problem That I have at the moment.
"After the wordpress update, I can no longer use the visual composer--front end and back end. When I start a new page, I can't add any elements. The element options pop up but when i click on one, nothing happens.
When trying to edit old pages, The page doesn't even show up".
I also did a wordpress update and have the same problem since than.