root@localhost:/home/ubuntu# ./snappy install xkcd-webserver
Installing xkcd-webserver
Starting download of xkcd-webserver
12.23 KB / 12.23 KB [===============================================================================================================================] 100.00 % 467.78 KB/s 0
Done
xkcd-webserver failed to install: hook command /usr/bin/aa-clickhook failed with exit status 1: Traceback (most recent call last):
  File "/usr/bin/aa-clickhook", line 196, in <module>
    sys.exit(main())
  File "/usr/bin/aa-clickhook", line 163, in main
    '--cache-loc=%s' % apparmor_cache])
  File "/usr/lib/python3/dist-packages/apparmor/click.py", line 121, in load_profiles
    (rc, output))
apparmor.common.AppArmorException: 'policy load failed with errno 1: b"AppArmor parser error for /var/lib/apparmor/profiles/click_xkcd-webserver.canonical_xkcd-webserver_0.5 in /etc/apparmor.d/abstractions/nameservice at line 79: Could not open \'abstractions/mdns\'\\n"'

root@localhost:/home/ubuntu#