In LXQt on Debian 13 NoMachine version 9.1.24 doesn’t detect the active physical session.

When the user tries to connect through NoMachine user interface, the following error message appears:

"Cannot detect any display running".

The local session on the same host is instead active and working correctly.

Relevant log message:

NXSERVER ServerPhysicalSession/ServerGetSessionList: Cannot get session process for display '0'.