On 2 or 3 occasions I have received the following error message when trying to Share content: "Your content could not be saved due to an error. You may have been logged out. If the problem persists please contact your system administrator. Click here to refresh this page".
Error msg snapshot attached.
I was logged-in every time it happened, however I am unable to identify the exact condition(s) that cause the Share functionality to fail. In other occasions it did work.