Error: E_ADEPT_NO_TOKEN

Hi, I purchase my ebooks from a local online store, takealot.com. I have a new laptop so I installed and authorised my Digital Editions. I purchased a new Ebook and it download to my library. But then I tried to download all my old Ebooks, because they did not automatically download when I refreshed my library. The I receive the error, "Error getting Licence. Licence Server Communication Problem: E_ADEPT_NO_TOKEN." I then proceeded to deauthorize and re-authorize my Digital Editions and the error continued. Does anyone know whether this is a Digital Editions error or with the online store?