package grub-pc 2.04-1ubuntu35.1 failed to install/upgrade: installed grub-pc package post-installation script subprocess returned error exit status 1

[K Chandrasekhar Omkar]

While installing as an OEM PC

ProblemType: Package
DistroRelease: Ubuntu 20.10
Package: grub-pc 2.04-1ubuntu35.1
ProcVersionSignature: Ubuntu 5.8.0-25.26-generic 5.8.14
Uname: Linux 5.8.0-25-generic x86_64
NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
ApportVersion: 2.20.11-0ubuntu50.2
AptOrdering: NULL: ConfigurePending
Architecture: amd64
CasperMD5CheckResult: pass
CasperVersion: 1.455
Date: Wed Nov 25 21:13:36 2020
DuplicateSignature:
 package:grub-pc:2.04-1ubuntu35.1
 Setting up tzdata (2020d-1ubuntu1) ...
 /var/lib/dpkg/info/tzdata.postinst: 44: 3: Bad file descriptor
 dpkg: error processing package tzdata (--configure):
  installed tzdata package post-installation script subprocess returned error exit status 2
ErrorMessage: installed grub-pc package post-installation script subprocess returned error exit status 1
LiveMediaBuild: Ubuntu 20.10 "Groovy Gorilla" - Release amd64 (20201022)
ProcCmdLine: BOOT_IMAGE=/casper/vmlinuz file=/cdrom/preseed/hostname.seed only-ubiquity oem-config/enable=true quiet splash ---
Python3Details: /usr/bin/python3.8, Python 3.8.6, python3-minimal, 3.8.6-0ubuntu1
PythonDetails: N/A
RelatedPackageVersions:
 dpkg 1.20.5ubuntu2
 apt 2.1.10
SourcePackage: grub2
Title: package grub-pc 2.04-1ubuntu35.1 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)