MQTT Error within Z-Wave JS UI

UPDATE: Just forgot to set the USER/PASS in ZJSUI

I keep getting this error with the MQTT, but Its enabled in the settings

This is the Settings Page

Any Thoughts?

Why use MQTT instead of the Websocket server?

Did you install the mosquito server?

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Looks to me like “core-mosquitto” is not a valid hostname, as “getaddrinfo” is failing to look up its IP address. The correct setting depends on how you installed and setup both Mosquitto and ZUI, due to different ways of configuring docker networks, but usually the mqtt server is exposing a port in docker so its IP address often works.

I belive I have done it correctly. I have:

and

which I have configured with my homeassistant user/pass