Failed to install/upgrade: installed grub-efi-amd64-signed package post-installation script subprocess returned error exit status 32

[Eric Levinson]

Freshly installed vm under Windows 10 HyperV. After installation - applied updates Grub was unable to update itself.

ProblemType: Package
DistroRelease: Ubuntu 20.04
Package: grub-efi-amd64-signed 1.142.8+2.04-1ubuntu26.6
ProcVersionSignature: Ubuntu 5.4.0-48.52-generic 5.4.60
Uname: Linux 5.4.0-48-generic x86_64
NonfreeKernelModules: lkp_Ubuntu_5_4_0_48_52_generic_73
ApportVersion: 2.20.11-0ubuntu27.10
Architecture: amd64
CasperMD5CheckResult: skip
Date: Mon Nov 2 18:09:19 2020
ErrorMessage: installed grub-efi-amd64-signed package post-installation script subprocess returned error exit status 32
Python3Details: /usr/bin/python3.8, Python 3.8.5, python3-minimal, 3.8.2-0ubuntu2
PythonDetails: N/A
RelatedPackageVersions:
 dpkg 1.19.7ubuntu3
 apt 2.0.2ubuntu0.1
SourcePackage: grub2-signed
Title: package grub-efi-amd64-signed 1.142.8+2.04-1ubuntu26.6 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)