package shim-signed 1.34.6+13-0ubuntu2 failed to install/upgrade: installed shim-signed package post-installation script subprocess returned error exit status 5

[Dmitry]

Hello!
I'm a new user Ubuntu 18.04.

At update/upgade the system, Ubuntu_update_manager show me that error.

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] Нет такого файла или каталога: '/proc/sys/kernel/moksbstate_disabled'
ApportVersion: 2.20.9-0ubuntu6
Architecture: amd64
Date: Tue Apr 24 09:38:09 2018
ErrorMessage: installed shim-signed package post-installation script subprocess returned error exit status 5
InstallationDate: Installed on 2018-01-28 (85 days ago)
InstallationMedia: Ubuntu 16.04.3 LTS "Xenial Xerus" - Release amd64 (20170801)
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: 6 0 0 0 0
SourcePackage: shim-signed
Title: package shim-signed 1.34.6+13-0ubuntu2 failed to install/upgrade: installed shim-signed package post-installation script subprocess returned error exit status 5
UpgradeStatus: No upgrade log present (probably fresh install)