[Bug 1901745] Re: 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

[Apport retracing service]

** Tags removed: need-duplicate-check

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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

Status in grub2-signed package in Ubuntu:
  New

Bug description:
  Received software update prompt. Followed prompts as always. Received message asking for GRUB location. Selected the SSD with dual boot to WIN7 and Ubuntu 20.04.01. 64 bit.  
  GNOME version 3.36.3

  Install failed.

  ProblemType: Package
  DistroRelease: Ubuntu 20.04
  Package: grub-efi-amd64-signed 1.142.8+2.04-1ubuntu26.6
  ProcVersionSignature: Ubuntu 5.4.0-52.57-generic 5.4.65
  Uname: Linux 5.4.0-52-generic x86_64
  NonfreeKernelModules: nvidia_modeset nvidia
  ApportVersion: 2.20.11-0ubuntu27.10
  Architecture: amd64
  CasperMD5CheckResult: skip
  Date: Tue Oct 27 13:02:58 2020
  DuplicateSignature:
   package:grub-efi-amd64-signed:1.142.8+2.04-1ubuntu26.6
   Setting up grub-efi-amd64-signed (1.142.8+2.04-1ubuntu26.6) ...
   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 2020-01-18 (283 days ago)
  InstallationMedia: Ubuntu 18.04.3 LTS "Bionic Beaver" - Release amd64 (20190805)
  Python3Details: /usr/bin/python3.8, Python 3.8.5, python3-minimal, 3.8.2-0ubuntu2
  PythonDetails: /usr/bin/python2.7, Python 2.7.18, python-is-python2, 2.7.17-4
  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: Upgraded to focal on 2020-10-10 (16 days ago)

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