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

[Richard Hanson]

package grub-pc2.02-2ubuntu8.7 failed to install/upgrade Synaptic Package Manager froze during the process.

ProblemType: Package
DistroRelease: Ubuntu 18.04
Package: grub-pc 2.02-2ubuntu8.7
ProcVersionSignature: Ubuntu 4.15.0-38.41-generic 4.15.18
Uname: Linux 4.15.0-38-generic x86_64
ApportVersion: 2.20.9-0ubuntu7.4
Architecture: amd64
Date: Fri Oct 26 19:36:32 2018
ErrorMessage: installed grub-pc package post-installation script subprocess returned error exit status 1
InstallationDate: Installed on 2018-10-24 (2 days ago)
InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426)
ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.15.0-38-generic root=UUID=fbfeffef-b3a5-438c-b703-ba4d238e55a3 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
 apt 1.6.3ubuntu0.1
SourcePackage: grub2
Title: package grub-pc 2.02-2ubuntu8.7 failed to install/upgrade: installed grub-pc package post-installation script subprocess returned error exit status 1
UpgradeStatus: No upgrade log present (probably fresh install)