Problems with Contact Form 7

Hi!!

Previously I sent a message because I had a problem with the plugin Contact Form 7.
When I activating the plugin, my wordpress doesn’t works and they appears all in white.
You said to me that it was because I had another plugin installed and this makes to the Contact Form 7 fail.

I have reviewed all my plugins, and the plugin that creates the error is: parallax_video_backgrounds_vc. My website is using this plugin so if I delete it, the Contact form run, but I need this plugin for my website design.
This plugin came with the template, so the website should work with both plugins.

How I can do for solve it?
Thanks!