Comment 2 for bug 1560094

Your snapcraft.yaml is wrong for the new world. Ie, you have:

apps:
  bluetoothctl:
    command: usr/bin/bluetoothctl
    uses: [bluez-client]
  obexctl:
    command: usr/bin/obexctl
    uses: [bluez-client]
  bluez:
    command: "usr/lib/bluetooth/bluetoothd -E"
    daemon: simple
    uses: [bluez-service]
  obex:
    command: "usr/lib/bluetooth/obexd"
    daemon: simple
    uses: [obex-service]
uses:
  bluez-client:
    type: migration-skill
    caps: [bluez_client]
  bluez-service:
    type: migration-skill
    security-policy:
      apparmor: bluez.apparmor
      seccomp: bluez.seccomp
  obex-service:
    type: migration-skill
    security-policy:
      apparmor: obex.apparmor
      seccomp: obex.seccomp

But you should 's/uses:/plugs:/' and 's/type: migration-skill/interface: old-security/'.