package ubuntu-app-launch 0.5+15.10.20150817-0ubuntu3 failed to install/upgrade: subprocess installed pre-removal script returned error exit status 1

[Kyle Taylor]

encountered this error while uninstalling the ubuntu-sdk package from apt.

ProblemType: Package
DistroRelease: Ubuntu 16.04
Package: ubuntu-app-launch 0.5+15.10.20150817-0ubuntu3
ProcVersionSignature: Ubuntu 4.8.0-41.44~16.04.1-generic 4.8.17
Uname: Linux 4.8.0-41-generic x86_64
NonfreeKernelModules: nvidia_uvm nvidia_drm nvidia_modeset nvidia
ApportVersion: 2.20.1-0ubuntu2.5
Architecture: amd64
Date: Sun Apr 9 09:33:07 2017
DuplicateSignature:
 package:ubuntu-app-launch:0.5+15.10.20150817-0ubuntu3
 Removing libunity-scopes1.0:amd64 (1.0.4+16.04.20160402.4-0ubuntu1) ...
 Cannot start click due to a conflict with a different locally-installed Python 'click' package. Remove it using Python packaging tools and try again.
 dpkg: error processing package libunity-scopes1.0:amd64 (--remove):
  subprocess installed pre-removal script returned error exit status 1
ErrorMessage: subprocess installed pre-removal script returned error exit status 1
InstallationDate: Installed on 2017-03-25 (15 days ago)
InstallationMedia: Ubuntu 16.04.2 LTS "Xenial Xerus" - Release amd64 (20170215.2)
RelatedPackageVersions:
 dpkg 1.18.4ubuntu1.1
 apt 1.2.19
SourcePackage: ubuntu-app-launch
Title: package ubuntu-app-launch 0.5+15.10.20150817-0ubuntu3 failed to install/upgrade: subprocess installed pre-removal script returned error exit status 1
UpgradeStatus: No upgrade log present (probably fresh install)