package grub-efi-amd64-signed 1.155.2+2.04-1ubuntu35.2 failed to install/upgrade: installed grub-efi-amd64-signed package post-installation script subprocess returned error exit status 1

Ubuntu 20.10 Installation ISO was Downloaded 14:50 Feb 12, 2021 - ISO Burned to DVD RW on 12:35 Feb 13, 2021
 - Bug happened at around 90% finished while installing Ubuntu 20.10 from DVD.

Everything seems to be updating and running as designed. This same issue happened earlier in the day while installing on an *identical machine.* That machine, too, is working as if nothing had happened. Not a worrisome bug, but mildly unsettling if one were new to Linux, or if someone were installing from a Windows OS (may be slightly discouraging.) No further action was required by myself to rectify any issues.

Both Machines were:
MSI B450 Tomahawk - BIOS 7C02v1H3 (Beta version 2021-2-1) - CPU AMD Ryzen 3600x 3800mhz (Static OC @ 4250 MHZ 1.325 Volt) - RAM Corsair 2400mhz (OC @ 4000 mhz 1.37 Volt)- GPU 0 Powercolor Red Devil RX480 OC @ 1410mhz (BIOS MODDED)-GPU1 Powercolor Red Devil RX480 OC @1410mhz (BIOS MODDED)

*The only difference between the machines was:
Machine 1 had a WD Blue SSD that was brand new/unused previously that the installation was on.
Machine 2 had a WD HDD That was Used - Wiped and formatted from windows that the installation was on.

Thank you.

ProblemType: Package
DistroRelease: Ubuntu 20.10
Package: grub-efi-amd64-signed 1.155.2+2.04-1ubuntu35.2
ProcVersionSignature: Ubuntu 5.8.0-43.49-generic 5.8.18
Uname: Linux 5.8.0-43-generic x86_64
ApportVersion: 2.20.11-0ubuntu50.5
Architecture: amd64
CasperMD5CheckResult: skip
Date: Sun Feb 14 01:38:25 2021
ErrorMessage: installed grub-efi-amd64-signed package post-installation script subprocess returned error exit status 1
InstallationDate: Installed on 2021-02-14 (0 days ago)
InstallationMedia: Ubuntu 20.10 "Groovy Gorilla" - Release amd64 (20201022)
Python3Details: /usr/bin/python3.8, Python 3.8.6, python3-minimal, 3.8.6-0ubuntu1
PythonDetails: N/A
RelatedPackageVersions:
 dpkg 1.20.5ubuntu2
 apt 2.1.10ubuntu0.2
SourcePackage: grub2-signed
Title: package grub-efi-amd64-signed 1.155.2+2.04-1ubuntu35.2 failed to install/upgrade: installed grub-efi-amd64-signed package post-installation script subprocess returned error exit status 1
UpgradeStatus: No upgrade log present (probably fresh install)