E_ADEPT_REQUEST_EXPIRED

[Sofia.97]

I've downloaded an ebook and created an adobe account which I then used to log into Adobe Digital Editions. It says that my computer is authorized, but when I try to open the book it says "Error getting License. License Server Communication Problem:
E_ADEPT_REQUEST_EXPIRED".

I have checked both my timezone, clock and date, and everything is correct. I tried downloading the book again but the issue remains. 

[pt_valme]

I am having the same issue and have tried the changing timezone, clock, and date. I uninstalled the software and reinstalled. I deleted all the previous downloads. May someone please give another solution to this problem?