package shim-signed 1.34.6+13-0ubuntu2 failed to install/upgrade: Unterprozess installed shim-signed package post-installation script gab den Fehler-Ausgangsstatus 5 zurück

[joachim]

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ProblemType: Package
DistroRelease: Ubuntu 18.04
Package: shim-signed 1.34.6+13-0ubuntu2
ProcVersionSignature: Ubuntu 4.15.0-15.16-generic 4.15.15
Uname: Linux 4.15.0-15-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
.proc.sys.kernel.moksbstate_disabled: Error: [Errno 2] Datei oder Verzeichnis nicht gefunden: '/proc/sys/kernel/moksbstate_disabled'
ApportVersion: 2.20.9-0ubuntu6
Architecture: amd64
Date: Tue Apr 24 06:53:58 2018
ErrorMessage: Unterprozess installed shim-signed package post-installation script gab den Fehler-Ausgangsstatus 5 zurück
Python3Details: /usr/bin/python3.6, Python 3.6.5, python3-minimal, 3.6.5-3
PythonDetails: /usr/bin/python2.7, Python 2.7.15rc1, python-minimal, 2.7.15~rc1-1
RelatedPackageVersions:
 dpkg 1.19.0.5ubuntu2
 apt 1.6.1
SecureBoot: 22 0 0 0 0
SourcePackage: shim-signed
Title: package shim-signed 1.34.6+13-0ubuntu2 failed to install/upgrade: Unterprozess installed shim-signed package post-installation script gab den Fehler-Ausgangsstatus 5 zurück
UpgradeStatus: No upgrade log present (probably fresh install)