package grub-efi-amd64-signed (not installed) failed to install/upgrade: installed grub-efi-amd64-signed package post-installation script subprocess returned error exit status 1

[Jairo Martinez]

s/d

ProblemType: Package
DistroRelease: Ubuntu 18.04
Package: grub-efi-amd64-signed (not installed)
ProcVersionSignature: Ubuntu 4.15.0-39.42-generic 4.15.18
Uname: Linux 4.15.0-39-generic x86_64
ApportVersion: 2.20.9-0ubuntu7.2
Architecture: amd64
Date: Wed Nov 21 10:47:37 2018
Df:
 S.ficheros bloques de 1K Usados Disponibles Uso% Montado en
 /dev/sda5 356655276 5121236 333347248 2% /
 /dev/sdc 1400768 1400768 0 100% /cdrom
 udev 3985888 0 3985888 0% /dev
 tmpfs 801456 1252 800204 1% /run
ErrorMessage: installed grub-efi-amd64-signed package post-installation script subprocess returned error exit status 1
Python3Details: /usr/bin/python3.6, Python 3.6.5, python3-minimal, 3.6.5-3ubuntu1
PythonDetails: /usr/bin/python2.7, Python 2.7.15rc1, python-minimal, 2.7.15~rc1-1
RelatedPackageVersions:
 dpkg 1.19.0.5ubuntu2
 apt 1.6.3
SourcePackage: grub2-signed
Title: package grub-efi-amd64-signed (not installed) 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)