package libapache2-mod-dnssd 0.6-3.2 failed to install/upgrade: installed libapache2-mod-dnssd package post-installation script subprocess returned error exit status 2

[Pratik Bhatia]

also have a problem to install ssh server.

ProblemType: Package
DistroRelease: Ubuntu 18.04
Package: libapache2-mod-dnssd 0.6-3.2
ProcVersionSignature: Ubuntu 4.15.0-23.25-generic 4.15.18
Uname: Linux 4.15.0-23-generic x86_64
ApportVersion: 2.20.9-0ubuntu7.2
Architecture: amd64
Date: Sun Jun 17 18:18:41 2018
DuplicateSignature:
 package:libapache2-mod-dnssd:0.6-3.2
 Setting up libapache2-mod-dnssd (0.6-3.2) ...
 /var/lib/dpkg/info/libapache2-mod-dnssd.postinst: 49: export: PLUS/instantclient-sqlplus-linux.x64-12.1.0.2.0/instantclient_12_1”: bad variable name
 dpkg: error processing package libapache2-mod-dnssd (--configure):
  installed libapache2-mod-dnssd package post-installation script subprocess returned error exit status 2
ErrorMessage: installed libapache2-mod-dnssd package post-installation script subprocess returned error exit status 2
InstallationDate: Installed on 2018-03-31 (79 days ago)
InstallationMedia: Ubuntu 16.04.2 LTS "Xenial Xerus" - Release amd64 (20170215.2)
Python3Details: /usr/bin/python3.6, Python 3.6.5, python3-minimal, 3.6.5-3
PythonDetails: /usr/bin/python2.7, Python 2.7.15rc1, python-minimal, 2.7.15~rc1-1
RelatedPackageVersions:
 dpkg 1.19.0.5ubuntu2
 apt 1.6.1
SourcePackage: mod-dnssd
Title: package libapache2-mod-dnssd 0.6-3.2 failed to install/upgrade: installed libapache2-mod-dnssd package post-installation script subprocess returned error exit status 2
UpgradeStatus: Upgraded to bionic on 2018-05-10 (39 days ago)