This seems different than the topic you mentioned.
In fact the logs from the agent suggest this is the issue with Wayland:
3706049 3706070 16:28:17 661.940 DrmGrabber: ERROR! DRM init failed.
3706049 3706070 16:28:17 665.154 WaylandPoller: ERROR! Grabber init failed.
We have an article to follow in this case:
https://www.nomachine.com/AR04R01083 (“Connecting to a Wayland-based desktop running in a Linux virtual machine”)
Please try the options here. I would suggest trying the “Option #2: Use EGL capture” first,
as this right now should be the most reliable way. Please note this way modifies the display manager,
so it would be necessary to restart it as pointed in the article and it may be inconvenient to do.
In this case option #1 would be the best.