From the logs, it looks like your VM disk setup has changed somehow. If you find a proper reproducer, then we can have a look.
** Changed in: grub2-signed (Ubuntu) Status: Confirmed => Incomplete -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2095443 Title: package grub-efi-amd64-signed 1.202.2+2.12-1ubuntu7.1 failed to install/upgrade: installed grub-efi-amd64-signed package post- installation script subprocess returned error exit status 32 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/grub2-signed/+bug/2095443/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs