package grub-efi-amd64-signed 1.66.14+2.02~beta2-36ubuntu3.14 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1

[Alan]

This bug was auto identified during an apt-get upgrade as a system error.

ProblemType: Package
DistroRelease: Ubuntu 16.04
Package: grub-efi-amd64-signed 1.66.14+2.02~beta2-36ubuntu3.14
ProcVersionSignature: Ubuntu 4.10.0-35.39~16.04.1-generic 4.10.17
Uname: Linux 4.10.0-35-generic x86_64
NonfreeKernelModules: talpa_vfshook talpa_pedconnector talpa_pedevice talpa_vcdevice talpa_core talpa_linux talpa_syscallhook nvidia_uvm nvidia
ApportVersion: 2.20.1-0ubuntu2.10
Architecture: amd64
Date: Sun Oct 29 09:16:34 2017
ErrorMessage: subprocess installed post-installation script returned error exit status 1
InstallationDate: Installed on 2017-02-19 (251 days ago)
InstallationMedia: Ubuntu 16.04.2 LTS "Xenial Xerus" - Release amd64 (20170215.2)
RelatedPackageVersions:
 dpkg 1.18.4ubuntu1.2
 apt 1.2.24
SourcePackage: grub2-signed
Title: package grub-efi-amd64-signed 1.66.14+2.02~beta2-36ubuntu3.14 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1
UpgradeStatus: No upgrade log present (probably fresh install)

[Launchpad Janitor (janitor)]

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