Hi there,
The HubUrl parameter should be included in the appsettings.json file of the lansweeper‑network‑discovery‑it‑sensor component, located at /opt/lansweeper-network-discovery-it-sensor.
If you open the Network Discovery Hub on port 59525 and check the Sensors section, you see the sensors the Hub already knows. If it’s listed there, the sensor and hub are already linked, and the HubUrl is set correctly automatically.