package grub-efi-amd64-signed 1.66.20+2.02~beta2-36ubuntu3.20 failed to install/upgrade: le sous-processus script post-installation installé a retourné une erreur de sortie d'état 1

[ccentpil]

no

ProblemType: Package
DistroRelease: Ubuntu 16.04
Package: grub-efi-amd64-signed 1.66.20+2.02~beta2-36ubuntu3.20
ProcVersionSignature: Ubuntu 4.15.0-46.49~16.04.1-generic 4.15.18
Uname: Linux 4.15.0-46-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.18
Architecture: amd64
Date: Wed Mar 6 14:00:16 2019
ErrorMessage: le sous-processus script post-installation installé a retourné une erreur de sortie d'état 1
RelatedPackageVersions:
 dpkg 1.18.4ubuntu1.5
 apt 1.2.29ubuntu0.1
SourcePackage: grub2-signed
Title: package grub-efi-amd64-signed 1.66.20+2.02~beta2-36ubuntu3.20 failed to install/upgrade: le sous-processus script post-installation installé a retourné une erreur de sortie d'état 1
UpgradeStatus: No upgrade log present (probably fresh install)