Please attach a screenshot of what you are seeing (it is not advisable to paste images directly into the topic or your reply).
Logs would be useful as well. After reproducing the problem, on the server host you are connecting to, open the NoMachine Settings > Server > Security > scroll down and take the logs. You can attach them here or send directly to forum[at]nomachine[dot] if you prefer. In that case, please use the title of this topic as the subject of your email. Thanks!
Hi, thanks for submitting the logs, we have reproduced the issue. It’s related to libnxegl not being preloaded due to system scripts not being updated correctly on Armbian. A Trouble Report has been opened. Please use the following link to monitor its status: https://kb.nomachine.com/TR07X11883.