This is also a problem between Ubuntu LTS versions. Specifically: I get the same error message when running unison on 20.04 (Focal Fossa) and trying to unison sync with a remote computer running 18.04 (Bionic Bever).
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1868502 Title: Synchronization with earlier Ubuntu versions or a recent Debian version fails To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/unison/+bug/1868502/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs