I'm having this exact same problem, every time I reboot and login. Opening up a terminal window and issuing "killall mate-panel" solves it, but is obviously an irritant. I can reproduce this reliably. Are there logs I can lookup, or something else I can provide to help?
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1757072 Title: new session brings: "The panel encountered a problem while loading "BriskMenuFactory::BriskMenu". To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-mate/+bug/1757072/+subscriptions -- ubuntu-bugs mailing list email@example.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs