I am getting the error E_ADEPT_REQUEST_EXPIRED. Nothing has changed, same computer, version of ADE, Nook Color, etc. Digital Editions just stopped accepting books in the .acsm format in the last couple of days. I have tried all of the suggested fixes, no joy. And going back the earlier version of Digital Editions will not work with the acsm format. What now?
I have the same problem.
Found these links in Google:
This link mentions having the wrong date, time, or time zone in your computer.
The second comment mentions this error is caused by downloading the eBook before the Acrobat Digital Edition is downloaded but it does not say how to resolve it. :-(