license server communication problem

[Thora22]

After successfully using ADE to download purchased epubs for several years using the same computer, I now get the this message:

Unable to Download

Error getting License. License Server Communication Problem:

E_AUTH_BAD_DEVICE_KEY_OR_PKCS12

Does anyone know how to solve this?

[Thora22]

Should add that I am using Mac OS 10.14 (Mojave)

[Nanaky]

    quit Adobe Digital Editions.

    Navigate to /Users/Library/Application Support/Adobe/Digital Editions and drag the activation.dat file to the trash.

    If you are using 10.7 and higher, see https://helpx.adobe.com/x-productkb/global/access-hidden-user-library-files.html

    Open Adobe Digital Editions and reauthorize.

[Thora22]

I have been to /Users/Library/Application Support/ but find no

"Adobe/Digital Editions" folder

Any suggestions?

[Nanaky]

You check the right library (hidden user library)?

[defaulticxbwwg4lp8w]

I am getting the same error on an IPad Pro 2021.  Is it outlandish for me to get your advice for this same problem on an IPad?

David M