Need some help with my visual composer elements

Hi Happy New Year!
So, I was hoping someone could help me with my site and the visual composer section in pages. The back end of the visual composer won't open properly nor allow me to select elements on pages.

The site name is: http://www.debut-media.com/cavelier/

Can someone possibly take a look and assist?
I have granted access.
Thank you so very much.

Mark