Comment 1 for bug 1993137

Dropping FAN support from the preseed fixes the problem:

config:
  cluster.https_address: 172.31.13.156:8443
  core.https_address: 172.31.13.156:8443
networks:
- config:
    ipv4.dhcp.expiry: infinite
    ipv4.nat: "true"
  description: ""
  name: lxdbr0
  type: bridge
  project: default
storage_pools:
- config:
    size: 19GiB
  description: ""
  name: data
  driver: zfs
profiles:
- config: {}
  description: Default LXD profile
  devices:
    eth0:
      nictype: bridged
      parent: lxdfan0
      type: nic
    root:
      path: /
      pool: data
      type: disk
  name: default
- config:
    boot.autostart: "true"
    security.nesting: "true"
  description: ""
  devices: {}
  name: juju-anbox-cloud
- config:
    boot.autostart: "true"
    security.nesting: "true"
  description: ""
  devices: {}
  name: juju-controller
- config:
    boot.autostart: "true"
    security.nesting: "true"
  description: ""
  devices: {}
  name: juju-default
projects:
- config:
    features.images: "true"
    features.networks: "true"
    features.profiles: "true"
    features.storage.volumes: "true"
  description: De