When the server host is booted and it's starting, sometimes the NoMachine server is not able yet to connect to the License Server and issues errors.

Logs report:

6136 6140 2026-04-15 00:33:16 974.302 NXSERVER Starting WECSS 9.4.14 and services.
6136 6140 2026-04-15 00:33:16 974.302 NXSERVER System information: Windows 11, standalone.
6136 6812 2026-04-15 00:33:17 018.184 Io/Io: WARNING! Can't resolve IP host 'license.nomachine.com'.
6136 6812 2026-04-15 00:33:17 019.185 Io/Io: WARNING! Error is 11001, 'Host not found'.
6136 6812 2026-04-15 00:33:17 019.185 TcpConnector/TcpConnector: ERROR! Can't resolve host 'license.nomachine.com'.
6136 6812 2026-04-15 00:33:17 019.185 TcpConnector/TcpConnector: ERROR! Error is 11001, 'Host not found'.
6136 6812 2026-04-15 00:33:17 019.185 TcpConnector/TcpConnector: ERROR! In method 'start' context [D].
Error: Can't resolve host 'license.nomachine.com'.
Error: Error is 11001, 'Host not found'.
Error: In method 'start' context [D].

As a workaround, restart the server.