After downloading the EPUB of the 3 ebooks that I purchased in the Google Play Store, the ACSM-files don't open in ADOBE DIGITAL EDITIONS because "Communication problem with license-server : E_ADEPT_DOCUMENT_TOO_SHORT :".
Deleting the Adept key in the Registry Editor and reauthorizing ADE didn't solve the solution for me.
Waiting for an answer by Adobe.
E_ADEPT_DOCUMENT_TOO_SHORT is a error with the Server of the eBooks. Try it later again (then has work for me) -> If not you should contact Google.
This error message indicates a problem with a particular book file(s) on the server. You may have to try the download again and check if that works.
In case it persists, please try contacting the eBook provider.
Thank you for the message Sharad,
Unfortunately, the matter still persists after downloading the .epub.acsm files again. I shall check with Google and come back to you.