IPCError when starting Ubuntu One

Launching Ubuntu One prints the following error message:

    Sorry, an error has occurred and Ubuntu One needs to close
    IPCError

When I run u1sdtool in the terminal it outputs the following error:

    Oops, an error ocurred:
    org.freedesktop.DBus.Error.Spawn.ChildExited: Process /usr/lib/ubuntuone-client/ubuntuone-syncdaemon exited with status 1

I suspect the error has something to do with a Python dependency since I have fiddled around with pip, but I'm not sure. How should I proceed?

ProblemType: Bug
DistroRelease: Ubuntu 13.04
Package: ubuntuone-control-panel-qt 4.2.0-0ubuntu1
ProcVersionSignature: Ubuntu 3.8.0-25.37-generic 3.8.13
Uname: Linux 3.8.0-25-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.9.2-0ubuntu8.1
Architecture: amd64
Date: Tue Jun 18 20:32:08 2013
ExecutablePath: /usr/bin/ubuntuone-control-panel-qt
InstallationDate: Installed on 2012-12-29 (171 days ago)
InstallationMedia: Ubuntu 12.10 "Quantal Quetzal" - Release amd64 (20121017.5)
InterpreterPath: /usr/bin/python2.7
MarkForUpload: True
PackageArchitecture: all
ProcEnviron:
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: ubuntuone-control-panel
UpgradeStatus: Upgraded to raring on 2013-04-30 (49 days ago)