Hi the logs (which were long and for this reason were extracted and attached separately) were from the Player side. We need logs from the server side to understand why the NoMachine server cannot create a new display.
You should also tell us what desktop environment your VM is running. From what you submitted in your original question, I can’t see a desktop GUI running there. You can install one using
sudo apt-get install ubuntu-desktop.
Please take a look at our tutorial for Google Cloud users:
If none of our tips and suggestions work and you can submit logs from the server which can be extracted using the instructions here: https://knowledgebase.nomachine.com/DT11R00182
Please submit them to forum[at]nomachine[dot]com using the title of this topic as the subject of your email. Thanks!