The above message continues to appear and I am unable to download books from Internet Archive.
I've tried everything with any result so far... I've upgraded the program, deauthorised and reauthorised, created a new Adobe ID, deleted old files folder...
Please, I need help this is driving me crazy.
Having exactly the same problem with archive.org. Tried with Digital Editions on two different machines and also went through the reinstall and reauthorise options with one of them. I can however download books purchased from the Play Store suggesting this may be a problem at archive.org rather than with Digital Editions.
Reporting the same issue from Australia with Archive.org. Trawling through Google, it seems it is a recurring error that happens at least once a year :0( There is no solution to it, other than alerting Adobe Tech staff, which is what I am doing.