"An error occurred while uploading. Please try again."
I frequently get emails with PDFs that need to be signed. I "sign" the document in Acrobat Pro by clicking the pen tool and placing my signature. I click "next" in order to save the doc as a read-only file, choose the location where I want to save it, and get this error:

Why am I getting this? I assume I have some preference set to upload all my docs, but if so I can't find it. None of the preferences seem to clearly indicate that this is what it's trying to do. Assuming this IS what is happening, where is the preference to turn it off? And why is this suddenly not working?
