I have used ADE for a while mostly with books from Google Play. I'be never had any issues but yesterday I tried to load a couple of books onto ADE and the following messages came up: E_ADEPT_INTERNAL_ERROR or E_LIC_LICENSE_SIGN_ERROR.
i have tried everything. Using different browsers, deleting all traces I could find of ADE and it still doesnt work. The sample book from Adobe website does work though so it seems to be a problem with books you have to pay for. Does anyone know any solutions?