Hello,
Based on the information you provided (you omitted the distribution and version which would be useful to know), we cannot say why you are encountering this issue. We will need logs to understand better.
Please follow the instructions about collecting logs from https://www.nomachine.com/DT07M00098. After editing server.cfg and node.cfg reproduce issue and send them to forum[at]nomachine[dot]com.
Could you also check if command ‘nxexec –auth’ works correctly, on linux default path is: ‘$ /usr/NX/bin/nxexec –auth’
IMPORTANT! when you call this command the password will be visible on your command line.
Correct output will be similar to: “User authorized, is member of: nomachine.”