Looking at the DpkgTerminalLog, this was a problem with click hooks or something related affecting apt, which resulted in a couple of bug reports like this one in other projects. This was a transient issue unrelated to unity-scopes-api and it was fixed, so closing this bug.
** Changed in: unity-scopes-api (Ubuntu) Status: New => Invalid -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to unity-scopes-api in Ubuntu. https://bugs.launchpad.net/bugs/1568054 Title: package libunity-scopes1.0 1.0.4+16.04.20160317-0ubuntu1 failed to install/upgrade: subprocess new pre-removal script returned error exit status 1 Status in unity-scopes-api package in Ubuntu: Invalid Bug description: happened on login ProblemType: Package DistroRelease: Ubuntu 16.04 Package: libunity-scopes1.0 1.0.4+16.04.20160317-0ubuntu1 ProcVersionSignature: Ubuntu 4.4.0-17.33-generic 4.4.6 Uname: Linux 4.4.0-17-generic x86_64 NonfreeKernelModules: nvidia_uvm nvidia_drm nvidia_modeset nvidia ApportVersion: 2.20.1-0ubuntu1 Architecture: amd64 Date: Fri Apr 8 10:04:15 2016 ErrorMessage: subprocess new pre-removal script returned error exit status 1 InstallationDate: Installed on 2016-03-30 (9 days ago) InstallationMedia: Ubuntu-GNOME 15.10 "Wily Werewolf" - Release amd64 (20151021) RelatedPackageVersions: dpkg 1.18.4ubuntu1 apt 1.2.10 SourcePackage: unity-scopes-api Title: package libunity-scopes1.0 1.0.4+16.04.20160317-0ubuntu1 failed to install/upgrade: subprocess new pre-removal script returned error exit status 1 UpgradeStatus: Upgraded to xenial on 2016-03-30 (9 days ago) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/unity-scopes-api/+bug/1568054/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp