上記のように、公開ボタンを押して、レビューを投稿したいのですが、エラーがでてしまいます。
どうすれば、投稿できるようになりますか？
ご教授いただけると幸いです。

ログ：

wily@werewolf:~$ software-center
2015-11-29 23:01:03,820 - softwarecenter.backend.zeitgeist_logger - WARNING - Support for Zeitgeist disabled
2015-11-29 23:01:03,837 - softwarecenter.ui.gtk3.app - INFO - setting up proxy 'None'
2015-11-29 23:01:04,112 - softwarecenter.backend.reviews - WARNING - Could not get usefulness from server, no username in config file
2015-11-29 23:01:04,113 - softwarecenter.plugin - INFO - activating plugin '<module 'webapps_activation' from '/usr/share/software-center/softwarecenter/plugins/webapps_activation.pyc'>'
2015-11-29 23:01:04,136 - softwarecenter.db.pkginfo_impl.aptcache - INFO - aptcache.open()
/usr/bin/software-center:184: Warning: Source ID 145 was not found when attempting to remove it
  Gtk.main()
/usr/bin/software-center:184: Warning: Source ID 70 was not found when attempting to remove it
  Gtk.main()

(software-center:4757): Gtk-WARNING **: unmatched gtk_style_context_save/restore() detected while validating context for softwarecenter+ui+gtk3+widgets+apptreeview+AppTreeView 0x2a58fa0
2015-11-29 23:01:11,961 - softwarecenter.backend.spawn_helper - WARNING - exit code 1 from helper for '['/usr/share/software-center/piston_generic_helper.py', '--datadir', '/usr/share/software-center/', '--needs-auth', '--no-relogin', 'SoftwareCenterAgentAPI', 'subscriptions_for_me', '{"complete_only": true}']'
2015-11-29 23:01:11,961 - softwarecenter.backend.spawn_helper - WARNING - got error from helper: 'WARNING:__main__:401: {'status': '401', 'x-request-id': 'VlsFJwoZOCUAAAwNek8AAACb1', 'via': '1.1 juju-prod45-u1-sca-machine-25 (squid/3.3.8)', 'x-cache': 'MISS from juju-prod45-u1-sca-machine-25', 'content-language': 'en', 'transfer-encoding': 'chunked', 'x-cache-lookup': 'MISS from juju-prod45-u1-sca-machine-25:3128', 'expires': 'Sun, 29 Nov 2015 14:01:11 GMT', 'vary': 'Authorization,Accept-Language,Cookie', 'server': 'gunicorn/19.3.0', 'last-modified': 'Sun, 29 Nov 2015 14:01:11 GMT', 'etag': '"7e287fc885d9fdcf42da3a12f38572c1"', 'strict-transport-security': 'max-age=2592000', 'cache-control': 'max-age=0', 'date': 'Sun, 29 Nov 2015 14:01:11 GMT', 'x-bzr-revision-number': '2562', 'content-type': 'text/html; charset=utf-8', 'www-authenticate': 'OAuth realm="SoftwareCenter Agent"'}
'
2015-11-29 23:01:11,961 - softwarecenter.db.update - WARNING - update_from_software_center_agent: error: 'WARNING:__main__:401: {\'status\': \'401\', \'x-request-id\': \'VlsFJwoZOCUAAAwNek8AAACb1\', \'via\': \'1.1 juju-prod45-u1-sca-machine-25 (squid/3.3.8)\', \'x-cache\': \'MISS from juju-prod45-u1-sca-machine-25\', \'content-language\': \'en\', \'transfer-encoding\': \'chunked\', \'x-cache-lookup\': \'MISS from juju-prod45-u1-sca-machine-25:3128\', \'expires\': \'Sun, 29 Nov 2015 14:01:11 GMT\', \'vary\': \'Authorization,Accept-Language,Cookie\', \'server\': \'gunicorn/19.3.0\', \'last-modified\': \'Sun, 29 Nov 2015 14:01:11 GMT\', \'etag\': \'"7e287fc885d9fdcf42da3a12f38572c1"\', \'strict-transport-security\': \'max-age=2592000\', \'cache-control\': \'max-age=0\', \'date\': \'Sun, 29 Nov 2015 14:01:11 GMT\', \'x-bzr-revision-number\': \'2562\', \'content-type\': \'text/html; charset=utf-8\', \'www-authenticate\': \'OAuth realm="SoftwareCenter Agent"\'}\n'
/usr/lib/python2.7/dist-packages/gi/overrides/GLib.py:572: Warning: Source ID 20 was not found when attempting to remove it
  super(MainLoop, self).run()
2015-11-29 23:01:13,131 - softwarecenter.db.utils - INFO - software-center-agent finished with status 0

(software-center:4757): Gtk-WARNING **: unmatched gtk_style_context_save/restore() detected while validating context for softwarecenter+ui+gtk3+widgets+apptreeview+AppTreeView 0x2a58fa0
/usr/bin/software-center:184: Warning: Source ID 777 was not found when attempting to remove it
  Gtk.main()
/usr/bin/software-center:184: Warning: Source ID 775 was not found when attempting to remove it
  Gtk.main()
/usr/bin/software-center:184: Warning: Source ID 1359 was not found when attempting to remove it
  Gtk.main()

(software-center:4757): Gtk-WARNING **: Unable to show 'none': サポートしていない操作です

(software-center:4757): Gtk-WARNING **: unmatched gtk_style_context_save/restore() detected while validating context for softwarecenter+ui+gtk3+widgets+apptreeview+AppTreeView 0x2a58fa0