In my case, the sidebar.rc file was on the Ubuntu 16.04 system and appears to have been needed there. When I upgraded to Ubuntu 18.04, I did not delete that file. The mutt version included in Ubuntu 18.04 does not need that sidebar.rc file.
I did what Walter recommended and removed /etc/Mutt.rc/sidebar.rc. The mutt on Ubuntu 18.04 works great for me now that the sidebar.rc file is removed. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1755755 Title: Error in Mutt sidebar when mutt is started To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/mutt/+bug/1755755/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
