http://www.bookbrainz.org/ and http://www.acousticbrainz.org/ and http://www.listenbrainz.org/ and http://www.messybrainz.org/ and http://www.picard.musicbrainz.org/ are currently broken, and login on https://www.critiquebrainz.org/ is broken too (CB-364).

All of these should probably redirect to their (HTTPS) non-www counterpart rather than giving errors. (This is the behaviour of the MB, MeB, and CAA sites currently.)