502 Bad Gateway Zigbee2mqtt

My full Zigbee2mqtt configuration - ConBee II coordinator

data_path: /config/zigbee2mqtt
socat:
  enabled: false
  master: pty,raw,echo=0,link=/tmp/ttyZ2M,mode=777
  slave: tcp-listen:8486,keepalive,nodelay,reuseaddr,keepidle=1,keepintvl=1,keepcnt=5
  options: "-d -d"
  log: true
mqtt:
  base_topic: zigbee2mqtt
  server: mqtt://192.168.68.184
  user: mqtt
  password: mqtt
serial:
  port: >-
    /dev/serial/by-id/usb-dresden_elektronik_ingenieurtechnik_GmbH_ConBee_II_DE2124565-if00
  adapter: deconz
external_converters: []
devices: devices.yaml
groups: groups.yaml
homeassistant: true
permit_join: false
advanced:
  log_level: info
  pan_id: 6754
  channel: 11
  network_key:
    - 1
    - 3
    - 5
    - 7
    - 9
    - 11
    - 13
    - 15
    - 0
    - 2
    - 4
    - 6
    - 8
    - 10
    - 12
    - 13
  availability_blocklist: []
  availability_passlist: []
  elapsed: true
  last_seen: ISO_8601_local
device_options: {}
blocklist: []
passlist: []
queue: {}
frontend:
  port: 8099
experimental: {}
availability: false

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