What am I doing wrong? I can't create a digital signature...I have tried to use my master password established on "My Adobe" and other options as well. I get the same message every time. Since there is only one password line I am confused as to what the message even means?
It seems you tried to fetch in the previously created signature preference file. If you don't remember the actual password, sadly there is not much that can be done.
I would suggest you creating a new digital id.