session-installer crashed with ImportError in /usr/lib/python3/dist-packages/sessioninstaller/core.py: No module named 'xdg'

Trying to add the first printer. Before the list of possible printers appears.

ProblemType: Crash
DistroRelease: Ubuntu 16.04
Package: sessioninstaller 0.20+bzr150-0ubuntu3
ProcVersionSignature: Ubuntu 4.4.0-12.28-generic 4.4.4
Uname: Linux 4.4.0-12-generic x86_64
ApportVersion: 2.20-0ubuntu3
Architecture: amd64
Date: Sun Mar 13 20:01:34 2016
ExecutablePath: /usr/bin/session-installer
InstallationDate: Installed on 2016-03-05 (8 days ago)
InstallationMedia: Xubuntu 16.04 LTS "Xenial Xerus" - Alpha amd64 (20160305)
InterpreterPath: /usr/bin/python3.5
PackageArchitecture: all
ProcCmdline: /usr/bin/python3 /usr/bin/session-installer
ProcEnviron:
 SHELL=/bin/bash
 XDG_RUNTIME_DIR=<set>
 PATH=(custom, no user)
 LANGUAGE=en_US
 LANG=en_US.UTF-8
PythonArgs: ['/usr/bin/session-installer']
SourcePackage: sessioninstaller
Title: session-installer crashed with ImportError in /usr/lib/python3/dist-packages/sessioninstaller/core.py: No module named 'xdg'
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo