package grub-efi-amd64-signed 1.167~16.04.2+2.04-1ubuntu44 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1

[Arnab Roy]

While software update, it fails and asks to report this problem.

ProblemType: Package
DistroRelease: Ubuntu 16.04
Package: grub-efi-amd64-signed 1.167~16.04.2+2.04-1ubuntu44
ProcVersionSignature: Ubuntu 4.4.0-210.242-generic 4.4.262
Uname: Linux 4.4.0-210-generic x86_64
NonfreeKernelModules: wl
ApportVersion: 2.20.1-0ubuntu2.30
Architecture: amd64
Date: Tue Jun 1 06:49:51 2021
ErrorMessage: subprocess installed post-installation script returned error exit status 1
InstallationDate: Installed on 2016-12-31 (1612 days ago)
InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1)
RelatedPackageVersions:
 dpkg 1.18.4ubuntu1.7
 apt 1.2.35
SourcePackage: grub2-signed
Title: package grub-efi-amd64-signed 1.167~16.04.2+2.04-1ubuntu44 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1
UpgradeStatus: No upgrade log present (probably fresh install)