Activation Server error - code E_Adept_Internal
I am continuing to receive this error code when I try to open my book. I have read the other article relevant to this issue, which suggested de-authorizing and then re-authorizing my computer. However, when I attempt to de-authorize, I get another error message: "Unable to erase authorization. Please try after some time." I am using Adobe Digital Editions version 4.5, on a Macbook Air running OS X Yosemite 10.10.5
Please advise.
