package grub-efi-amd64 2.02-2ubuntu8.7 failed to install/upgrade: installed grub-efi-amd64 package post-installation script subprocess returned error exit status 1

[Christian Promitzer]

Happened when upgrading 18.04 LTS today with "apt-get dist-upgrade"

ProblemType: Package
DistroRelease: Ubuntu 18.04
Package: grub-efi-amd64 2.02-2ubuntu8.7
Uname: Linux 4.15.0-041500rc6-generic x86_64
ApportVersion: 2.20.9-0ubuntu7.4
Architecture: amd64
Date: Fri Nov 2 16:56:26 2018
ErrorMessage: installed grub-efi-amd64 package post-installation script subprocess returned error exit status 1
InstallationDate: Installed on 2017-07-31 (459 days ago)
InstallationMedia: Ubuntu 17.04 "Zesty Zapus" - Release amd64 (20170412)
ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.15.0-041500rc6-generic root=UUID=798590ed-1225-43d3-9106-65c4c7bc9e4a ro quiet splash vt.handoff=1
Python3Details: /usr/bin/python3.6, Python 3.6.6, python3-minimal, 3.6.5-3ubuntu1
PythonDetails: /usr/bin/python2.7, Python 2.7.15rc1, python-minimal, 2.7.15~rc1-1
RelatedPackageVersions:
 dpkg 1.19.0.5ubuntu2.1
 apt 1.6.6
SourcePackage: grub2
Title: package grub-efi-amd64 2.02-2ubuntu8.7 failed to install/upgrade: installed grub-efi-amd64 package post-installation script subprocess returned error exit status 1
UpgradeStatus: Upgraded to bionic on 2018-08-09 (84 days ago)