I had this problem also and found another possible reason.I was using the long URL to access Workspace:http://<aem_forms_server>/lc/libs/livecycle/core/content/login.html?ap=1I get the error about the cookies in every browser (Chrome, FF, IE and Edge), both on the server itself, and through remote a...

You cannot set the save options using the ReaderExtensions service.  This is done separately using the  PDFUtilitySaveMode object:http://help.adobe.com/en_US/livecycle/9.0/programLC/help/index.htm?content=001005.htmlDavid.