This is my first attempt to install the product and all seemed to go well. The component is installed and appears to be working. However when posting a comment you hit the send button and get the spinning arrows...but nothign happens. The arrows spin for minutes at a time and I have to back out of the page eventually to continue on with anything else.
I have the feeling that you use version 3.26 . Please upgrade to 4.0 beta2 if possible. Also try it with a standard joomla template - perhaps something happens with all the jquery stuff you have in the template. What I see is that no request is send to the server, but at the moment I can not say why.