javascript 'undefined' prompt pops up many times

[nima1981]

Hi, thanks for this great plugin.

I've installed the required tags on my site to test it and after submitting a comment the user always gets a prompt with the message "undefined" and an Ok button requiring confirmation. After clicking ok it shows up again and so, sometimes it only goes away via refresh.

Eventually upon returning to the page it seems like the comments have been posted fine.

I'm testing it on a post: https://dissentwatch.com/boost/?boost_post_id=534149