[Bug 1890932] Re: package grub-efi-amd64-signed 1.142.4+2.04-1ubuntu26.2 failed to install/upgrade: installed grub-efi-amd64-signed package post-installation script subprocess returned error exit status 255

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** Tags removed: need-duplicate-check

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Title:
  package grub-efi-amd64-signed 1.142.4+2.04-1ubuntu26.2 failed to
  install/upgrade: installed grub-efi-amd64-signed package post-
  installation script subprocess returned error exit status 255

Status in grub2-signed package in Ubuntu:
  New

Bug description:
  root at ava:~# apt autoremove 
  Reading package lists... Done
  Building dependency tree       
  Reading state information... Done
  0 upgraded, 0 newly installed, 0 to remove and 52 not upgraded.
  root at ava:~# apt update && apt upgrade -y
  Ign:1 http://ppa.launchpad.net/ansible/ansible/ubuntu focal InRelease
  Hit:2 http://de.archive.ubuntu.com/ubuntu focal InRelease
  Hit:3 http://ppa.launchpad.net/nm-l2tp/network-manager-l2tp/ubuntu focal InRelease
  Err:4 http://ppa.launchpad.net/ansible/ansible/ubuntu focal Release
    404  Not Found [IP: 91.189.95.83 80]
  Err:2 http://de.archive.ubuntu.com/ubuntu focal InRelease
    The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 3B4FE6ACC0B21F32 NO_PUBKEY 871920D1991BC93C
  Get:5 http://de.archive.ubuntu.com/ubuntu focal-updates InRelease [111 kB]
  Err:3 http://ppa.launchpad.net/nm-l2tp/network-manager-l2tp/ubuntu focal InRelease
    The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 80B70870665AB177
  Get:6 http://de.archive.ubuntu.com/ubuntu focal-backports InRelease [98.3 kB]
  Err:5 http://de.archive.ubuntu.com/ubuntu focal-updates InRelease
    The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 3B4FE6ACC0B21F32 NO_PUBKEY 871920D1991BC93C
  Get:7 http://de.archive.ubuntu.com/ubuntu focal-security InRelease [107 kB]
  Err:6 http://de.archive.ubuntu.com/ubuntu focal-backports InRelease
    The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 3B4FE6ACC0B21F32 NO_PUBKEY 871920D1991BC93C
  Err:7 http://de.archive.ubuntu.com/ubuntu focal-security InRelease
    The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 3B4FE6ACC0B21F32 NO_PUBKEY 871920D1991BC93C
  Reading package lists... Done
  E: The repository 'http://ppa.launchpad.net/ansible/ansible/ubuntu focal Release' does not have a Release file.
  N: Updating from such a repository can't be done securely, and is therefore disabled by default.
  N: See apt-secure(8) manpage for repository creation and user configuration details.
  W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: http://de.archive.ubuntu.com/ubuntu focal InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 3B4FE6ACC0B21F32 NO_PUBKEY 871920D1991BC93C
  W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: http://ppa.launchpad.net/nm-l2tp/network-manager-l2tp/ubuntu focal InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 80B70870665AB177
  W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: http://de.archive.ubuntu.com/ubuntu focal-updates InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 3B4FE6ACC0B21F32 NO_PUBKEY 871920D1991BC93C
  W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: http://de.archive.ubuntu.com/ubuntu focal-backports InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 3B4FE6ACC0B21F32 NO_PUBKEY 871920D1991BC93C
  W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: http://de.archive.ubuntu.com/ubuntu focal-security InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 3B4FE6ACC0B21F32 NO_PUBKEY 871920D1991BC93C

  ProblemType: Package
  DistroRelease: Ubuntu 20.04
  Package: grub-efi-amd64-signed 1.142.4+2.04-1ubuntu26.2
  ProcVersionSignature: Ubuntu 5.4.0-42.46-generic 5.4.44
  Uname: Linux 5.4.0-42-generic x86_64
  ApportVersion: 2.20.11-0ubuntu27.4
  Architecture: amd64
  CasperMD5CheckResult: pass
  Date: Sat Aug  8 09:13:51 2020
  ErrorMessage: installed grub-efi-amd64-signed package post-installation script subprocess returned error exit status 255
  InstallationDate: Installed on 2020-07-16 (23 days ago)
  InstallationMedia: Ubuntu-Server 20.04 LTS "Focal Fossa" - Release amd64 (20200423)
  Python3Details: /usr/bin/python3.8, Python 3.8.2, 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 1.142.4+2.04-1ubuntu26.2 failed to install/upgrade: installed grub-efi-amd64-signed package post-installation script subprocess returned error exit status 255
  UpgradeStatus: No upgrade log present (probably fresh install)

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