Some uploads by our Jive users says error on external storage provider's end. Can you please explain how to solve it? Would be a great help.
Reviewing through your description, I would recommend submitting a case in your customer group as a next step so that a member of you support team can assist with further investigations into your specific instance. When you submit the case, if you can please provide a link to the place where you are seeing this message it should help them in their investigation.