Ok - now that this is the third time I've typed my question, hopefully this works.
I am trying to download library books to my Kobo, which I've done a lot of times before. Now I'm getting an error message that says that the document is "protected by Adobe Digital Rights Management" and asks me to sign-in with an authorized Adobe ID. I have signed in with my authorized Adobe ID, logged out and signed in again a couple of times to no avail. I've returned the book and re-signed it out, again, to no avail. Any suggestions on how to fix this?
I have developed the same problem. Did you figure out how to fix?