unable to download error getting license, license server communication problem E_ADEPT_NO_TOKEN

[Kimlundie]

i am trying to download a ebook that requires adobe digital editions.  I am getting this message 

unable to download

error getting license, license server communication problem

E_ADEPT_NO_TOKEN

[moved to Digital Editions by a moderator]

[Ravikotla]

Licence

[anmali]

I have big problems with read older E-books with ascm they get server authtentication problem as well a new bought Ebook that I could not ad as it gets  server authtentication problem.  The seller asys I must re- autorize the computer, but that does not work as well