package openvpn 2.3.10-1ubuntu2.1 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1

[Nixon Kamugisha]

This is open vpn

ProblemType: Package
DistroRelease: Ubuntu 16.04
Package: openvpn 2.3.10-1ubuntu2.1
ProcVersionSignature: Ubuntu 4.15.0-48.51~16.04.1-generic 4.15.18
Uname: Linux 4.15.0-48-generic x86_64
NonfreeKernelModules: wl
ApportVersion: 2.20.1-0ubuntu2.18
Architecture: amd64
Date: Sun May 5 09:56:22 2019
ErrorMessage: subprocess installed post-installation script returned error exit status 1
InstallationDate: Installed on 2019-04-25 (9 days ago)
InstallationMedia: Ubuntu 16.04.2 LTS "Xenial Xerus" - Release amd64 (20170215.2)
RelatedPackageVersions:
 dpkg 1.18.4ubuntu1.5
 apt 1.2.31
SourcePackage: openvpn
Title: package openvpn 2.3.10-1ubuntu2.1 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1
UpgradeStatus: No upgrade log present (probably fresh install)

[Andreas Hasenack (ahasenack)]

Thanks for filing this bug in Ubuntu.

This is the error:
insserv: warning: script 'S99runmbbservice' missing LSB tags and overrides
insserv: warning: script 'runmbbservice' missing LSB tags and overrides
insserv: There is a loop between service plymouth and urandom if started
insserv: loop involving service urandom at depth 4
insserv: loop involving service hwclock at depth 3
insserv: There is a loop between service runmbbservice and udev if started
insserv: loop involving service udev at depth 1
insserv: Starting runmbbservice depends on plymouth and therefore on system facility `$all' which can not be true!

"mbbservice" is not software that comes from Ubuntu. It has incorrect LSB headers in its initscript, and is what is causing the problem here. You should remove it, or request a fixed version from whoever provided that software to you.

https://answers.launchpad.net/ubuntu/+source/apt/+question/284708 is related, hope this helps. I'm going to mark this bug as invalid, since it is not about software shipped with Ubuntu.