From the logs it appears that you are trying to connect using SSH. Are you able to ssh in to the server host with another Windows SSH client (e.g. Putty or other)?
Additionally, it would be a good idea to send us the <user’s home>/.nx/R-(newest-dir)/connection file of the whole .nx from the client side. Make sure you check ‘Do no delete logs’ in the player before reproducing the issue. Attach them in the forum, or if it’s a large file, send it to issues[at]nomachine.com
Thank you.