ubuntu-software will not launch

[unconfused]

"ubuntu-software" will not launch. The icon will flash as if it were going to launch, but then disappears.

This error is thrown:

Gs-WARNING **: failed to open plugin /usr/lib/gs-plugins-9/libgs_plugin_xdg_app_reviews.so: /usr/lib/gs-plugins-9/libgs_plugin_xdg_app_reviews.so: cannot open shared object file: No such file or directory

However this error happens even on a working installation. So, this error would not seem to be the issue.

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: ubuntu-software 3.20.1+git20160420.1.ca63436.ubuntu-xenial-0ubuntu2
ProcVersionSignature: Ubuntu 4.4.0-21.37-generic 4.4.6
Uname: Linux 4.4.0-21-generic x86_64
NonfreeKernelModules: wl
ApportVersion: 2.20.1-0ubuntu2
Architecture: amd64
CurrentDesktop: Unity
Date: Mon May 2 19:36:55 2016
EcryptfsInUse: Yes
InstallationDate: Installed on 2016-04-26 (6 days ago)
InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1)
SourcePackage: gnome-software
UpgradeStatus: No upgrade log present (probably fresh install)

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.