Comment 2 for bug 1959433

Actually, I believe it was this commit to charmhelpers - https://github.com/juju/charm-helpers/commit/8b30083f5f5c7fea597fc92472325bba3aefdc5c

I believe this causes the charms to go into a waiting state, not an error state iirc. Essentially blocked waiting for internal endpoints to be provided.