Hi.
I write again to comment that it works perfect in LUBUNTU 18.04, I just followed the instructions in the post "How to run 9Hits Viewer on Debian" (I did not use the command for the vnc or XFCE).
Link: http://blog.9hits.com/2017/12/how-to-run-9hits-viewer-on-debian.html
Greetings.