package grub-efi-amd64-signed 1.102+2.02-2ubuntu13 failed to install/upgrade: installed grub-efi-amd64-signed package post-installation script subprocess returned error exit status 1

[Zeeshan]

i appeared during upgrade 18.04 to 18.10

ProblemType: Package
DistroRelease: Ubuntu 18.10
Package: grub-efi-amd64-signed 1.102+2.02-2ubuntu13
ProcVersionSignature: Ubuntu 4.17.0-6.7-generic 4.17.9
Uname: Linux 4.17.0-6-generic x86_64
ApportVersion: 2.20.10-0ubuntu7
Architecture: amd64
Date: Sun Oct 28 21:36:29 2018
ErrorMessage: installed grub-efi-amd64-signed package post-installation script subprocess returned error exit status 1
InstallationDate: Installed on 2018-09-24 (34 days ago)
InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426)
Python3Details: /usr/bin/python3.6, Python 3.6.6, python3-minimal, 3.6.6-1
PythonDetails: /usr/bin/python2.7, Python 2.7.15, python-minimal, 2.7.15-3
RelatedPackageVersions:
 dpkg 1.19.0.5ubuntu3
 apt 1.7.0~alpha2ubuntu2
SourcePackage: grub2-signed
Title: package grub-efi-amd64-signed 1.102+2.02-2ubuntu13 failed to install/upgrade: installed grub-efi-amd64-signed package post-installation script subprocess returned error exit status 1
UpgradeStatus: Upgraded to cosmic on 2018-10-28 (0 days ago)