Fill and Sign - CAnnot Save - Returns Unknown error

Acrobat Reader DC Version 2015.017.20053

Windows 10 Pro 10.0.14393 Build 14393

I see that there are a few issues pertaining to fill and sign, but most indicate not being able to do so at all.

My issue is somewhat different in that I can go through the entire process of filling and signing the document, but when I try and Save or Save as, Acrobat Reader DC returns an error: "The operation failed because Adobe Acrobat DC encountered an unknown error"

If one opens the Fill and Sign option and tries to save without making any additions, amendments or signatures, it does not encounter the issue and will save the document quite happily. The moment one enters any text or a signature and attempts to save, it returns the above error.

I have uninstalled and reinstalled the program in its entirety (this includes removing and cleaning up the registry and folders prior to reinstalling). I attempted repairing the installation. All to no avail.

Edited to add: I have tested this version of Adobe Reader DC on a pre-Anniversary Update Version of Windows 10 Pro and on a Windows 7 Ultimate platform with exactly the same issues. It is clear that the problem is with the latest iteration of Adobe Reader DC and not with the platform that it is running on.

Message was edited by: Craig King