package grub-efi-amd64 2.02~beta2-9ubuntu1.15 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1

[Stuart Rogers]

I have no idea..

ProblemType: Package
DistroRelease: Ubuntu 14.04
Package: grub-efi-amd64 2.02~beta2-9ubuntu1.15
ProcVersionSignature: Ubuntu 4.4.0-140.166~14.04.1-generic 4.4.162
Uname: Linux 4.4.0-140-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.29
Architecture: amd64
Date: Sat Dec 15 11:19:04 2018
DuplicateSignature: package:grub-efi-amd64:2.02~beta2-9ubuntu1.15:subprocess installed post-installation script returned error exit status 1
ErrorMessage: subprocess installed post-installation script returned error exit status 1
InstallationDate: Installed on 2015-12-30 (1080 days ago)
InstallationMedia: Ubuntu 14.04.3 LTS "Trusty Tahr" - Beta amd64 (20150805)
ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-140-generic.efi.signed root=UUID=76ab8c28-cc19-4373-b92d-8bceebd70ac1 ro quiet splash vt.handoff=7
RelatedPackageVersions:
 dpkg 1.17.5ubuntu5.8
 apt 1.0.1ubuntu2.18
SourcePackage: grub2
Title: package grub-efi-amd64 2.02~beta2-9ubuntu1.15 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1
UpgradeStatus: No upgrade log present (probably fresh install)