This error occurs when you have exhausted the limit for machine/devices authorized with same Adobe id.
Select Digital Editions for step 1 and Adobe ID and signing in for step 2.
Click Still need help? Contact us.
When the option appears, click Chat now.
I have the same problem. So I contacted the Chat-Support.
They were not able to help me. I have been told, that there is no support for Digital Editions.
I´ve to go to the forum and look for usefull informations and help. That´s what i have done before, I contacted the chat support
What I need to know is, which devices are connected to my Adobe ID and how i can disable the unused mobile devices from my Adobe ID, to connet an new one (e-book).
So mayby someone can help me.
I did this and they told me I had to come back to here.