Thanks. I just sent the log (although it’s called nxinstall.log, not install.log, and is in /Library/Application Support/NoMachine/var/log rather than in /var/log). In the meantime, I found the missing folder (sorry, I was looking in the wrong subfolder, my bad), but I still can’t connect, with no error message. The nxserver.log is full of lines like this:
\103 15619 2023-12-27 15:07:04 882.848 NetworkChange: WARNING! Interface name is not available.