Just posting here since I’m new to NoMachine but this issue is really confusing when searching the net
I was trying to connect a phone on my physical machine(windows 10) an tunnel the USB connection to a remote one (ios). Things just didn’t work so I tried different solutions regarding usb transmission over the net. By luck I found Flexihub, which complained about the fact I had “USB Network Gate” installed. Well, I unistalled USB Network gate, flexihub didn’t work due subscription issues so I went back to NoMachine a second time and things worked fine.
I really believe USB network gate was the problem, it was installed by a colleague and was a pain to uninstall.
So my 5 cents: Give a check for USB Network Gate or any other USB over ethernet solutions you have installed since they have a way to hide themselves out of the usual application folder in mac, uninstall them and try again.