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Ubuntu One worked perfectly for me before the update. After i switched to Ubuntu 12.04 Precise (Beta 2), It crashed with an error message:

CredentialsError
DBusException(dbus.String(u'Traceback (most recent call last):\n  File "/usr/lib/python2.7/dist-packages/dbus/service.py", line 707, in _message_cb\n    retval = candidate_method(self, *args, **keywords)\n  File "/usr/lib/python2.7/dist-packages/ubuntuone-client/ubuntuone/platform/credentials/linux.py", line 185, in find_credentials\n    reply_handler=reply_handler, error_handler=error_handler)\n  File "/usr/lib/python2.7/dist-packages/dbus/proxies.py", line 137, in __call__\n    **keywords)\n  File "/usr/lib/python2.7/dist-packages/dbus/connection.py", line 584, in call_async\n    message.append(signature=signature, *args)\nValueError: Unable to guess signature from an empty dict\n'),)

I even checked the bug report for bug #711162 at https://bugs.launchpad.net/ubuntu/+source/ubuntuone-client/+bug/711162

I waited for the beta to get over, but even after that, it still doesn't work!

I need some help, because i use Ubuntu One for a lot of my work, and i need it back ASAP!

And another weird thing is that this happened only AFTER UPDATING! Before that, it was perfect!

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You should try reinstalling the official .iso from the Ubuntu website, I've found that not reinstalling after a beta sometimes causes problems. – Ross Fleming Apr 29 '12 at 12:32
possible duplicate of "Credentials" Error -- UbuntuOne Cannot Start – James Henstridge Apr 30 '12 at 1:18
Welcome to Ask Ubuntu! This question should instead be filed as a bug report, and as such is off-topic, thanks! Instructions on filing a bug report are here. – fossfreedom♦ Apr 30 '12 at 6:30

closed as off topic by James Henstridge, Jorge Castro, fossfreedom♦ Apr 30 '12 at 6:30

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