Hi, we are trying to support all possible distro/WM combinations. Scientific Linux is not currently in our supported distros list. See this article for more information:
https://www.nomachine.com/AR11K00740
That said, to allow us to check what’s going on we will need full set of logs from server side. You can attach them here or send them to issues[at]nomachine[dot]com .
https://www.nomachine.com/AR07K00677
Additionally, please list the X server running on your server, you can do it by executing:
# ps axuwww| grep X