Gateway Never Seen - Chirpstack Gateway OS - Raspberry Pi 4B

I am using the RAK7289V2 LoRaWAN Gateway (registered it on its web interface) and hosting the LoRaWAN Network Server on a Raspberry Pi 4B after I flashed the full image of Chirpstack Gateway OS onto the sd card. I am trying to connect the gateway and network server using the built in MQTT bridge in the RAK gateway. Both have a wired ethernet connection.

Using mosquitto_sub -h localhost -t “gateway/#” -v on the os command line i can see that packets are being sent to the MQTT broker (mosquitto). However, when I register the gateway on the Chirpstack web interface the gateway says it has never been seen?

Anyone have any suggestions on how to fix this?

You must be missing the MQTT topic prefix. Your MQTT messages should start with a region, like eu868/gateway/# or us915_1/gateway/#. Configure this in the raks MQTT forwarder.