package ca-certificates 20180409 failed to install/upgrade: installed ca-certificates package post-installation script subprocess returned error exit status 1

[s]

got the message during upgrade

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: Wed Apr 18 18:44:14 2018
ErrorMessage: installed ca-certificates package post-installation script subprocess returned error exit status 1
InstallationDate: Installed on 2014-10-27 (1269 days ago)
InstallationMedia: Ubuntu-GNOME 14.10 "Utopic Unicorn" - Release amd64 (20141022.1)
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 1
UpgradeStatus: Upgraded to bionic on 2018-04-19 (0 days ago)

[Apport retracing service (apport)]

Thank you for taking the time to report this crash and helping to make this software better. This particular crash has already been reported and is a duplicate of bug #1765253, so is being marked as such. Please look at the other bug report to see if there is any missing information that you can provide, or to see if there is a workaround for the bug. Additionally, any further discussion regarding the bug should occur in the other report. Please continue to report any other bugs you may find.