Yes, I still get an error on my Live site – All I get is “Error in processing!”. I don’t have debugging enabled on the live site, so I cant check the debug log.
As you told it’s working for your other system so might be there is some configuration difference or other plugin is conflicts with it.
The error “Error in processing!” is the JavaScript AJAX error it comes when AJAX doesn’t return success and comes to the error. Could you please open the Console and let me know what JS errors are there.