Ads not showing on Chrome

I have the plugin installed and running, and it works perfect on Firefox and IE, but in Chrome the ads are not working. They are in the page but I have a css file that set its visibility to hidden and display to none, but I don’t know where is this css coming from. I don’t know if it is an incompatibility with another plugin or why could this be happening.

https://wordpress.org/plugins/float-left-right-advertising/