Regression in 0.16 due to this commit which makes some client commands skip the login step: http://git.beaker-project.org/cgit/beaker/commit/?id=dc9bb8fac1f54144507df78d0d54770eae60ddf2 That commit failed to take into account that some systems may be hidden to anonymous users if their "view" permission is restricted.
On Gerrit: http://gerrit.beaker-project.org/3046
This bug fix has been applied to the release-0.16 branch, however we have elected not to do another maintenance release of the 0.16.x series. This fix will be included in 0.17.0 instead.
Beaker 0.17.0 has been released.