It seems likely that this happens as a result of going back forward through the installation process -- if you click "continue" but then chicken out and hit "back" it seems like things go Wrong.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1948902 Title: Ubuntu MATE installer crashes after partition management To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubiquity/+bug/1948902/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs