package libnunit-mocks2.6.3-cil 2.6.4+dfsg-1 failed to install/upgrade: installed libnunit-mocks2.6.3-cil package post-removal script subprocess returned error exit status 1

[aniket a dalvi]

Shows too many errors and process halted after upgrade ubuntu 20.04

ProblemType: Package
DistroRelease: Ubuntu 20.04
Package: libnunit-mocks2.6.3-cil 2.6.4+dfsg-1
Uname: Linux 5.4.18-050418-generic x86_64
ApportVersion: 2.20.11-0ubuntu27.12
AptOrdering:
 libnunit-mocks2.6.3-cil:amd64: Remove
 NULL: ConfigurePending
Architecture: amd64
CasperMD5CheckResult: skip
Date: Sun Nov 22 09:12:06 2020
DpkgTerminalLog:
 Removing libnunit-mocks2.6.3-cil (2.6.4+dfsg-1) ...
 E: File does not exist: /usr/share/cli-common/packages.d/policy.2.6.nunit.mocks.installcligac
 dpkg: error processing package libnunit-mocks2.6.3-cil (--remove):
  installed libnunit-mocks2.6.3-cil package post-removal script subprocess returned error exit status 1
 dpkg: too many errors, stopping
DuplicateSignature:
 package:libnunit-mocks2.6.3-cil:2.6.4+dfsg-1
 Removing libnunit-mocks2.6.3-cil (2.6.4+dfsg-1) ...
 E: File does not exist: /usr/share/cli-common/packages.d/policy.2.6.nunit.mocks.installcligac
 dpkg: error processing package libnunit-mocks2.6.3-cil (--remove):
  installed libnunit-mocks2.6.3-cil package post-removal script subprocess returned error exit status 1
ErrorMessage: installed libnunit-mocks2.6.3-cil package post-removal script subprocess returned error exit status 1
InstallationDate: Installed on 2018-06-05 (900 days ago)
InstallationMedia: Ubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160719)
PackageArchitecture: all
Python3Details: /usr/bin/python3.8, Python 3.8.5, python3-minimal, 3.8.2-0ubuntu2
PythonDetails: /usr/bin/python2.7, Python 2.7.18, python-is-python2, 2.7.17-4
RelatedPackageVersions:
 dpkg 1.19.7ubuntu3
 apt 2.0.2ubuntu0.1
SourcePackage: nunit
Title: package libnunit-mocks2.6.3-cil 2.6.4+dfsg-1 failed to install/upgrade: installed libnunit-mocks2.6.3-cil package post-removal script subprocess returned error exit status 1
UpgradeStatus: No upgrade log present (probably fresh install)