Cannot see Raspberry Pi Gateway online in Chirpstack

After installing chirpstack-gateway-bridge package and get and configure LoRa Packet Forwarder in a Raspberry Pi and all the necessary services (like MQTT and Node-RED) in an Ubuntu Server, I can see logs through MQTT comming from the gateway in Node-RED, but cannot see it online in Chirpstack, as it’s always in never seen status.

How should I proceed?

Thanks.

Please see this guide: Connecting a gateway - ChirpStack open-source LoRaWAN® Network Server documentation