package grub-efi-amd64-signed 1.106+2.02+dfsg1-5ubuntu4 failed to install/upgrade: installed grub-efi-amd64-signed package post-installation script subprocess returned error exit status 1

[Willem Hobers]

Was not doing anything on this laptop (it was idling whilst I was doing other things) when this message occured. Running Xubuntu 18.10.

ProblemType: Package
DistroRelease: Ubuntu 18.10
Package: grub-efi-amd64-signed 1.106+2.02+dfsg1-5ubuntu4
ProcVersionSignature: Ubuntu 4.18.0-7.8-generic 4.18.5
Uname: Linux 4.18.0-7-generic x86_64
ApportVersion: 2.20.10-0ubuntu11
Architecture: amd64
Date: Sun Sep 23 16:54:22 2018
ErrorMessage: installed grub-efi-amd64-signed package post-installation script subprocess returned error exit status 1
Python3Details: /usr/bin/python3.6, Python 3.6.6+, python3-minimal, 3.6.6-1
PythonDetails: /usr/bin/python2.7, Python 2.7.15+, python-minimal, 2.7.15-3
RelatedPackageVersions:
 dpkg 1.19.0.5ubuntu5
 apt 1.7.0~rc2
SourcePackage: grub2-signed
Title: package grub-efi-amd64-signed 1.106+2.02+dfsg1-5ubuntu4 failed to install/upgrade: installed grub-efi-amd64-signed package post-installation script subprocess returned error exit status 1
UpgradeStatus: No upgrade log present (probably fresh install)