I am having the same error. I know my credentials and can use them to log in on the website. Ubuntu One was working until today. Now it tries to connect, connects successfully, and then immediately disconnects.
I have tried deleting the login key, deleting my computer from the service and reinstalling ubuntu one according to the directions on canonical's site. The error shows up in syncdaemon-exceptions.log : 2014-02-20 19:39:07,221 - ubuntuone.SyncDaemon.Main - INFO - hash queue empty. We are ready! 2014-02-20 19:39:07,249 - twisted - ERROR - Unhandled error in Deferred: 2014-02-20 19:39:07,250 - twisted - ERROR - Unhandled Error Traceback (most recent call last): File "/usr/lib/python2.7/dist-packages/twisted/internet/defer.py", line 381, in callback self._startRunCallbacks(result) File "/usr/lib/python2.7/dist-packages/twisted/internet/defer.py", line 489, in _startRunCallbacks self._runCallbacks() File "/usr/lib/python2.7/dist-packages/twisted/internet/defer.py", line 576, in _runCallbacks current.result = callback(current.result, *args, **kw) File "/usr/lib/python2.7/dist-packages/twisted/internet/defer.py", line 1127, in gotResult _inlineCallbacks(r, g, deferred) --- <exception caught here> --- File "/usr/lib/python2.7/dist-packages/twisted/internet/defer.py", line 1071, in _inlineCallbacks result = g.send(result) File "/usr/lib/python2.7/dist-packages/ubuntuone-client/ubuntuone/syncdaemon/interaction_interfaces.py", line 1273, in connect raise NoAccessToken("got empty credentials.") ubuntuone.syncdaemon.interaction_interfaces.NoAccessToken: got empty credentials. The relevant lines of the syncdaemon.log are: 2014-02-20 19:48:05,097 - ubuntuone.SyncDaemon.ActionQueue - INFO - The request 'caps_raising_if_not_accepted' finished OK. 2014-02-20 19:48:05,254 - ubuntuone.SyncDaemon.ActionQueue - INFO - The request 'oauth_authenticate' failed with the error: TRY_AGAIN and was handled with the event: SYS_SERVER_ERROR 2014-02-20 19:48:05,256 - ubuntuone.SyncDaemon.StorageClient - INFO - Connection lost, reason: [Failure instance: Traceback (failure with no frames): <class 'twisted.internet.error.ConnectionLost'>: Connection to the other side was lost in a non-clean fashion: Connection lost. ]. and of credentials.log : 2014-02-20 19:49:39,687 - ubuntuone.credentials - DEBUG - login: args (<ubuntuone.platform.credentials.CredentialsManagementTool object at 0xaea5ccc>,), kwargs {'window_id': 0}. 2014-02-20 19:49:39,937 - ubuntuone.credentials - INFO - Starting Ubuntu One login manager for bus 'com.ubuntuone.Credentials'. 2014-02-20 19:49:39,942 - ubuntuone.credentials - DEBUG - ref_count is 0, changing value to 1. 2014-02-20 19:49:40,149 - ubuntuone.credentials - DEBUG - Handling DBus signal for member: 'CredentialsFound', app_name: dbus.String(u'Ubuntu One'). 2014-02-20 19:49:40,149 - ubuntuone.credentials - INFO - 'CredentialsFound' 2014-02-20 19:49:40,149 - ubuntuone.credentials - DEBUG - ref_count is 1, changing value to 0. 2014-02-20 19:49:40,149 - ubuntuone.credentials - DEBUG - Setting up timer with <function timeout_add at 0xb6ca4e64> (10000, <bound method CredentialsManagement.shutdown of <ubuntuone.platform.credentials.dbus_service.CredentialsManagement at /credentials at 0x87c56ec>>). 2014-02-20 19:49:40,149 - ubuntuone.credentials - INFO - CredentialsManagement: emitting CredentialsFound. 2 2014-02-20 19:49:40,150 - ubuntuone.credentials - DEBUG - cleanup: removing signal match <<class 'dbus.connection.SignalMatch'> at ae939ec "type='signal',sender='com.ubuntuone.Credentials',path='/credentials',interface='com.ubuntuone.CredentialsManagement',member='CredentialsFound'" on conn <dbus._dbus.SessionBus (session) at 0xab0a6ec>> 2014-02-20 19:49:40,150 - ubuntuone.credentials - DEBUG - cleanup: removing signal match <<class 'dbus.connection.SignalMatch'> at ae938cc "type='signal',sender='com.ubuntuone.Credentials',path='/credentials',interface='com.ubuntuone.CredentialsManagement',member='AuthorizationDenied'" on conn <dbus._dbus.SessionBus (session) at 0xab0a6ec>> 2014-02-20 19:49:40,151 - ubuntuone.credentials - DEBUG - cleanup: removing signal match <<class 'dbus.connection.SignalMatch'> at ae93b6c "type='signal',sender='com.ubuntuone.Credentials',path='/credentials',interface='com.ubuntuone.CredentialsManagement',member='CredentialsError'" on conn <dbus._dbus.SessionBus (session) at 0xab0a6ec>> ProblemType: Bug DistroRelease: Ubuntu 13.04 Package: ubuntuone-client 4.2.0-0ubuntu1 Uname: Linux gk 3.8.0-35-generic Architecture: i686 UpgradeStatus: Upgraded from 12.04 LANGUAGE: en LANG: en_US.UTF-8 SHELL: /bin/bash -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/910163 Title: Can't authenticate to U1 through Control Panel To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-sso-client/+bug/910163/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs