fedeari7 on "[Plugin: Autoptimize] Site Broken"

Hello there,
I'm using wordpress 4.0 with your plugin Autopimize 1.9.1
When the plugin is active the site is broken (completely messed up) and when I deactivate the plugin all seems to be back to normal.
Since I want to upgrade the page speed, how can I solve this problem?
Here is my URL: http://www.itinside.net/wp/
Thank you in advance.

https://wordpress.org/plugins/autoptimize/