package grub-efi-amd64-signed 1.93.10+2.02-2ubuntu8.9 failed to install/upgrade: Unterprozess installed grub-efi-amd64-signed package post-installation script gab den Fehler-Ausgangsstatus 1 zurück

the connection to bootloader Lenovo Ideapad 320 failed
problem is during installation step grub
problem is with grub-pc
problem is all time

ProblemType: Package
DistroRelease: Ubuntu 18.04
Package: grub-efi-amd64-signed 1.93.10+2.02-2ubuntu8.9
ProcVersionSignature: Ubuntu 4.15.0-29.31-generic 4.15.18
Uname: Linux 4.15.0-29-generic x86_64
NonfreeKernelModules: kpatch_livepatch_Ubuntu_4_15_0_29_31_generic_42
ApportVersion: 2.20.9-0ubuntu7.2
Architecture: amd64
Date: Wed Dec 5 16:13:36 2018
ErrorMessage: Unterprozess installed grub-efi-amd64-signed package post-installation script gab den Fehler-Ausgangsstatus 1 zurück
InstallationDate: Installed on 2018-12-05 (0 days ago)
InstallationMedia: Ubuntu 18.04.1 LTS "Bionic Beaver" - Release amd64 (20180725)
Python3Details: /usr/bin/python3.6, Python 3.6.5, python3-minimal, 3.6.5-3ubuntu1
PythonDetails: N/A
RelatedPackageVersions:
 dpkg 1.19.0.5ubuntu2
 apt 1.6.3
SourcePackage: grub2-signed
Title: package grub-efi-amd64-signed 1.93.10+2.02-2ubuntu8.9 failed to install/upgrade: Unterprozess installed grub-efi-amd64-signed package post-installation script gab den Fehler-Ausgangsstatus 1 zurück
UpgradeStatus: No upgrade log present (probably fresh install)