Hi, the logs are from the player side, we would also need to see the logs from the server side (the computer you are connecting to) in order to understand better.
Is the remote computer headless? If so, please take a look at the article here, in particular point 3.
Connecting to Linux headless machines with NoMachine
https://knowledgebase.nomachine.com/AR03P00973
If that doesn’t help, please submit the server logs and send them to forum[at]nomachine[dot]com. Instructions for extracting the logs are here: https://knowledgebase.nomachine.com/DT11R00182
Also tell us the desktop environment that is running on the remote Debian computer.