package grub-pc 2.02~beta2-36ubuntu3.23 failed to install/upgrade: subprocess installed post-installation script returned error exit status 2

[vasanthakumar nagamuthu]

After upgrading from 14.04 to 16.04 - I couldn't install or update any softares.

ProblemType: Package
DistroRelease: Ubuntu 16.04
Package: grub-pc 2.02~beta2-36ubuntu3.23
ProcVersionSignature: Ubuntu 4.4.0-131.157-generic 4.4.134
Uname: Linux 4.4.0-131-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.21
Architecture: amd64
Date: Sat Feb 1 12:43:24 2020
ErrorMessage: subprocess installed post-installation script returned error exit status 2
InstallationDate: Installed on 2015-04-10 (1759 days ago)
InstallationMedia: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2)
InvalidGrubScript: /etc/grub.d/npm-debug.log
ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-131-generic root=UUID=07935254-34c0-419a-b6d8-8b99ac1a2600 ro recovery nomodeset
RelatedPackageVersions:
 dpkg 1.18.4ubuntu1.6
 apt 1.2.32
SourcePackage: grub2
Title: package grub-pc 2.02~beta2-36ubuntu3.23 failed to install/upgrade: subprocess installed post-installation script returned error exit status 2
UpgradeStatus: No upgrade log present (probably fresh install)