package grub-efi-amd64-signed 1.93.14+2.02-2ubuntu8.13 failed to install/upgrade: installed grub-efi-amd64-signed package post-installation script subprocess returned error exit status 255

[danny]

I reinstalled ubuntu 18.04 in which I used a partition that was used by OpenSuse before. After installation of Ubuntu I performed the first update when a system problem was mentioned for which this error report was made.

ProblemType: Package
DistroRelease: Ubuntu 18.04
Package: grub-efi-amd64-signed 1.93.14+2.02-2ubuntu8.13
ProcVersionSignature: Ubuntu 4.15.0-29.31-generic 4.15.18
Uname: Linux 4.15.0-29-generic x86_64
ApportVersion: 2.20.9-0ubuntu7.7
Architecture: amd64
Date: Thu Aug 22 14:34:02 2019
DuplicateSignature:
 package:grub-efi-amd64-signed:1.93.14+2.02-2ubuntu8.13
 Setting up grub-efi-amd64-signed (1.93.14+2.02-2ubuntu8.13) ...
 dpkg: error processing package grub-efi-amd64-signed (--configure):
  installed grub-efi-amd64-signed package post-installation script subprocess returned error exit status 255
ErrorMessage: installed grub-efi-amd64-signed package post-installation script subprocess returned error exit status 255
InstallationDate: Installed on 2019-08-20 (1 days ago)
InstallationMedia: Ubuntu 18.04.1 LTS "Bionic Beaver" - Release amd64 (20180725)
Python3Details: /usr/bin/python3.6, Python 3.6.8, python3-minimal, 3.6.7-1~18.04
PythonDetails: N/A
RelatedPackageVersions:
 dpkg 1.19.0.5ubuntu2
 apt 1.6.11
SourcePackage: grub2-signed
Title: package grub-efi-amd64-signed 1.93.14+2.02-2ubuntu8.13 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)

[Launchpad Janitor (janitor)]

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