package grub-pc 2.02~beta2-36ubuntu3.15 failed to install/upgrade: subprocess installed post-installation script returned error exit status 20

[punyabrat kumar]

failed to install

ProblemType: Package
DistroRelease: Ubuntu 16.04
Package: grub-pc 2.02~beta2-36ubuntu3.15
ProcVersionSignature: Ubuntu 4.4.0-104.127-generic 4.4.98
Uname: Linux 4.4.0-104-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.14
Architecture: amd64
Date: Wed Jan 3 18:16:16 2018
DuplicateSignature:
 package:grub-pc:2.02~beta2-36ubuntu3.15
 Setting up grub-pc (2.02~beta2-36ubuntu3.15) ...
 dpkg: error processing package grub-pc (--configure):
  subprocess installed post-installation script returned error exit status 20
ErrorMessage: subprocess installed post-installation script returned error exit status 20
InstallationDate: Installed on 2016-11-07 (422 days ago)
InstallationMedia:

ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-104-generic.efi.signed root=UUID=8ec31e72-2cd5-4a2e-8764-fdbe02245114 ro i8042.reset
RelatedPackageVersions:
 dpkg 1.18.4ubuntu1.3
 apt 1.2.24
SourcePackage: grub2
Title: package grub-pc 2.02~beta2-36ubuntu3.15 failed to install/upgrade: subprocess installed post-installation script returned error exit status 20
UpgradeStatus: No upgrade log present (probably fresh install)

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[adrya (adrya-stembridge)]

Received the same error when upgrading from Linux Mint 18.2 to 18.3.