I checked out an e-book from my local library (using the ADE version option). I downloaded the .acsm file. When I attempt to add the book to my PC's library or simply open from the .acsm file, I get the above error message.
My library directed me to the OverDrive support folks who directed me to Adobe's support page which was singularly unhelpful. I've de-authorized and re-authorized my ADE. I can't delete and re-download the book. My library doesn't allow this format to be returned early, and I really don't want to have to wait until it expires to get it again in a different format.
I am using ADE version 3.0. My OS is Windows 7 64-bit Home Premium SP1. I use Firefox 55.0.3 (32-bit).
Help me Obi-Wan Kenobi! You're my only hope.
Try to used other internet browser? Check if blocked your Firewall anything?
Switched to Chrome, and temporarily disabled firewall - no effect. I also tried to download other titles from the same library, and get the same error message.
I just updated to ADE v. 4.5.6. Still having this issue.
OK, I just got a book from the Open Library (openlibrary.org) that I was able to open. Seems like a problem with my local library.
In this case should contact your locl library that should check his download server.