I'm installing xubuntu 18.04.1 fresh, less than 15 minutes after the install finished I had a problem with vim-nox (a.k.a /usr/bin/vim.nox). I tried "ubuntu-bug vim-nox" and things got weird very fast. Almost immediately I saw a message like this: (apport-gtk:13898) dbind-WARNING: ... reporting a problem with "accessability bus". It was repeated. It did not ask for anything so I ignored it.
A firefox window opened, and it asked if I wanted to proceed. I did. Then it said Ooops! Something went wrong in Launchpad............
I'm reporting this using an older system, so I'm not copying all the details.
What I'm asking for is some channel to report this, or find a fix. I think the Launchpad problem is much more important than the original vim-nox thing. So that's what I'd like to solve.
I'm not going to try much with 18.04 until bug reporting works at the very least.