package shim-signed 1.34.7+13-0ubuntu2 failed to install/upgrade: installed shim-signed package post-installation script subprocess returned error exit status 1

During update to Ubuntu 18.04

ProblemType: Package
DistroRelease: Ubuntu 18.04
Package: shim-signed 1.34.7+13-0ubuntu2
ProcVersionSignature: Ubuntu 4.15.0-19.20-generic 4.15.17
Uname: Linux 4.15.0-19-generic x86_64
.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 20:14:35 2018
DuplicateSignature:
 package:shim-signed:1.34.7+13-0ubuntu2
 Processing triggers for shim-signed (1.34.7+13-0ubuntu2) ...
 No MOK found.
 dpkg: error processing package shim-signed (--configure):
  installed shim-signed package post-installation script subprocess returned error exit status 1
EFITables:
 Apr 24 20:18:58 begesein-Latitude-E6430 kernel: efi: EFI v2.31 by American Megatrends
 Apr 24 20:18:58 begesein-Latitude-E6430 kernel: efi: ACPI=0xcaff1000 ACPI 2.0=0xcaff1000 SMBIOS=0xf04c0 MPS=0xfd6d0
 Apr 24 20:18:58 begesein-Latitude-E6430 kernel: secureboot: Secure boot could not be determined (mode 0)
ErrorMessage: installed shim-signed package post-installation script subprocess returned error exit status 1
InstallationDate: Installed on 2017-11-30 (145 days ago)
InstallationMedia: Ubuntu-Budgie 17.10 "Artful Aardvark" - Release amd64 (20171017.1)
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 1.34.7+13-0ubuntu2 failed to install/upgrade: installed shim-signed package post-installation script subprocess returned error exit status 1
UpgradeStatus: Upgraded to bionic on 2018-04-24 (0 days ago)