So looks like this is a "race condition" caused by the new kpmcore API. It's a little hard to get it to reproduce according to upstream bug reports, but there's some suggestions to get it to go.
Upstream developers already have a branch going to fix it and it should be coming up in the new Calamares along with some more minor fixes: https://github.com/calamares/calamares/commits/kpmcore-manager -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1851188 Title: Failed to create a partition table - install failed To manage notifications about this bug go to: https://bugs.launchpad.net/calamares/+bug/1851188/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
