package unattended-upgrades 1.1ubuntu1.18.04.7~16.04.0 failed to install/upgrade: subprocess installed post-installation script returned error exit status 128

[Mohamed Heshmat]

Normal update

ProblemType: Package
DistroRelease: Ubuntu 16.04
Package: unattended-upgrades 1.1ubuntu1.18.04.7~16.04.0
ProcVersionSignature: Ubuntu 4.4.0-140.166-generic 4.4.162
Uname: Linux 4.4.0-140-generic x86_64
NonfreeKernelModules: nvidia_uvm nvidia_drm nvidia_modeset nvidia
.var.log.unattended-upgrades.unattended-upgrades.log:

ApportVersion: 2.20.1-0ubuntu2.18
Architecture: amd64
Date: Tue Dec 4 12:15:17 2018
ErrorMessage: subprocess installed post-installation script returned error exit status 128
InstallationDate: Installed on 2018-03-28 (251 days ago)
InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1)
PackageArchitecture: all
RelatedPackageVersions:
 dpkg 1.18.4ubuntu1.5
 apt 1.2.29
SourcePackage: unattended-upgrades
Title: package unattended-upgrades 1.1ubuntu1.18.04.7~16.04.0 failed to install/upgrade: subprocess installed post-installation script returned error exit status 128
UpgradeStatus: No upgrade log present (probably fresh install)
modified.conffile..etc.apt.apt.conf.d.10periodic:
 APT::Periodic::Update-Package-Lists "1";
 APT::Periodic::Download-Upgradeable-Packages "0";
 APT::Periodic::AutocleanInterval "0";
 APT::Periodic::Unattended-Upgrade "0";
mtime.conffile..etc.apt.apt.conf.d.10periodic: 2018-07-09T18:55:55.032675