Can't connect to MQTT server

[mortenserv]

I have a Home Assistant setup running in a Proxmox VM. I'm trying to seperate Z2M from Home Assistant and run it in a container instead so it is not dependant on Home Assistant.

I have setup the MQTT Broker and the Zigbee2MQTT container, but it just hangs when I attemp to start Zigbee2MQTT. User/PW should be good, just setup MQTT Broker again to be sure.

The screenshot is where it hangs.

Anyone who can help me further here or point me in a direction?

This is my configuration.yaml