I also tried to install version 20180409 after Ubuntu 18 was already working and the error is still there. It is not a problem of the upgrade procedure but a problem of the package itself.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1767453 Title: package ca-certificates 20180409 failed to install/upgrade: installed ca-certificates package post-installation script subprocess returned error exit status 1 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ca-certificates/+bug/1767453/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs