I have Adobe Digital Editions 4.5.7 installed on a 2017 iMac running OSX High Sierra.
When I try to load an .acsm file I get the following error message:
"Unable to download
Error getting license. License Server
Can anyone help me please?
I am surprised that there so many users with unanswered problems.
Is there a way to get Adobe to provide some support to users?
I stumbled upon the solution.
I deleted Adobe Digital Solutions from my system and then in /Library/Application Support/Adobe/ I deleted the folder “Digital Editions”. After that I re-installed version 4.5.7. When I tried to load an .acsm file I was prompted to get a new Adobe Id to authorise my computer. After that, everything was fine.