package ca-certificates 20180409 failed to install/upgrade: installed ca-certificates package post-installation script subprocess returned error exit status 2

[shemgp]

This error showed up when I was updating Ubuntu. Running :

cd /var/lib/dpkg/info
sudo -H -b bash -x ca-certificates.postinst configure
+ set -e
+ case "$1" in
+ '[' '!' -e /usr/local/share/ca-certificates ']'
+ dpkg-statoverride --list /usr/local/share/ca-certificates
++ stat -c %a /usr/local
+ chmod 755 /usr/local/share/ca-certificates
++ stat -c %u /usr/local
++ stat -c %g /usr/local
+ chown 0:0 /usr/local/share/ca-certificates
+ . /usr/share/debconf/confmodule
++ '[' '!' '' ']'
++ PERL_DL_NONLAZY=1
++ export PERL_DL_NONLAZY
++ '[' '' ']'
++ exec /usr/share/debconf/frontend ca-certificates.postinst configure

results in an error:

Can't exec "ca-certificates.config": No such file or directory at /usr/share/perl/5.26/IPC/Open3.pm line 178.
open2: exec of ca-certificates.config configure failed: No such file or directory at /usr/share/perl5/Debconf/ConfModule.pm line 59.

ProblemType: Package
DistroRelease: Ubuntu 18.04
Package: ca-certificates 20180409
ProcVersionSignature: Ubuntu 4.15.0-15.16-generic 4.15.15
Uname: Linux 4.15.0-15-generic x86_64
ApportVersion: 2.20.9-0ubuntu5
Architecture: amd64
Date: Tue Apr 17 15:03:03 2018
ErrorMessage: installed ca-certificates package post-installation script subprocess returned error exit status 2
InstallationDate: Installed on 2015-09-28 (931 days ago)
InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Release amd64 (20150422)
PackageArchitecture: all
Python3Details: /usr/bin/python3.6, Python 3.6.5, python3-minimal, 3.6.5-2
PythonDetails: /usr/bin/python2.7, Python 2.7.15rc1, python-minimal, 2.7.14-4
RelatedPackageVersions:
 dpkg 1.19.0.5ubuntu1
 apt 1.6~rc1
SourcePackage: ca-certificates
Title: package ca-certificates 20180409 failed to install/upgrade: installed ca-certificates package post-installation script subprocess returned error exit status 2
UpgradeStatus: No upgrade log present (probably fresh install)

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.