It seems that the eBook with which you are getting this error might have been authorised using a different Adobe ID or Vendor ID earlier. You may check in case you were earlier using a different Vendor ID or else check with the eBook provider to transfer entitlement of the eBook in question to the Adobe ID you are using at the moment.
Thank you for getting back to me.
I have spoken and fought with with the ebook provider and they continually declined to assist on the ground that they added a line to their T&Cs so that they can avoid dealing with these issues. They keep spewing some excuse about my token having expired, which I can only gather is completely unrelated.
Are you able to do the transfer from your side? I will provide any information that you need.
I'm having the same issue. At first it said that the vendor id was incorrect so I deleted the original files went back to the original vendor and attempted to download the material and adobe says it can't download the files because they have been fullfilled by another person