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 32

[Max Stubbs]

Description: Ubuntu 20.10
Release: 20.10

grub-efi:
  Installed: (none)
  Candidate: 2.04-1ubuntu35.2
  Version table:
     2.04-1ubuntu35.2 500
        500 http://us.archive.ubuntu.com/ubuntu groovy-updates/main amd64 Packages
     2.04-1ubuntu35 500
        500 http://us.archive.ubuntu.com/ubuntu groovy/main amd64 Packages

Description: System prompt appeared to perform a new upgrade. Accepted the prompt. After a short time, a prompt appeared listing my two other SSDs, and noted that a grub install was located on either an altered or unavailable disk. Checked the boxes for both listed drives and accepted the prompt. Shortly after, this bug was reported and I was prompted to report it here.

Environment:

              Thinkpad T420
              3 SSD each with different OS
              3 Operating Systems: Ubuntu 20.10, Kali, unregistered Windows 10 Education
              Boot order boots to Ubuntu Grub, then Kali, then Windows Boot Manager

Changes:
Recently cloned Windows 10 image from mSATA to SSD that contained Debian using Clonezilla.
Installed Kali onto mSATA containing original Windows 10 image.
Kali performed its own installation of Grub and took priority in boot order.
Ubuntu was unable to finish boot from Kali Grub menu. Restarted computer, selected Kali and performed update-grub, installed and then performed chkboot. Restarted computer, entered BIOS, reset boot order to the one listed in "Environment" above. Selected Ubuntu, performed update-grub and chkboot.

Changes made between 3-4 days ago.

ProblemType: Package
DistroRelease: Ubuntu 20.10
Package: grub-efi-amd64-signed 1.155.2+2.04-1ubuntu35.2
ProcVersionSignature: Ubuntu 5.8.0-40.45-generic 5.8.18
Uname: Linux 5.8.0-40-generic x86_64
ApportVersion: 2.20.11-0ubuntu50.3
Architecture: amd64
CasperMD5CheckResult: skip
Date: Wed Jan 27 11:08:31 2021
DuplicateSignature:
 package:grub-efi-amd64-signed:1.155.2+2.04-1ubuntu35.2
 Setting up grub-efi-amd64-signed (1.155.2+2.04-1ubuntu35.2) ...
 mount: /var/lib/grub/esp: special device /, does not exist.
 dpkg: error processing package grub-efi-amd64-signed (--configure):
  installed grub-efi-amd64-signed package post-installation script subprocess returned error exit status 32
ErrorMessage: installed grub-efi-amd64-signed package post-installation script subprocess returned error exit status 32
InstallationDate: Installed on 2020-11-05 (83 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: /usr/bin/python2.7, Python 2.7.18, python-is-python2, 2.7.17-4
RebootRequiredPkgs:
 linux-image-5.8.0-41-generic
 linux-base
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 32
UpgradeStatus: No upgrade log present (probably fresh install)

[Launchpad Janitor (janitor)]

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