I'm facing the same issue in KDE Neon, I ran the usual package updates in Muon around 2 weeks back and now I see this error message every time I update or install a new package.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1814113 Title: package linux-image-4.15.0-45-generic 4.15.0-45.48 failed to install/upgrade: installed linux-image-4.15.0-45-generic package post- installation script subprocess returned error exit status 1 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1814113/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
