trying to de-authorize ADE receiving "unable to erase authorization. please try after some time"

i went through these steps to erase the authorization & keep receiving an error.

Resetting your Adobe authorization

1. Open Adobe Digital Editions (ADE) if it's not already open.
2. Press Ctrl + Shift + D (Command + Shift +D on a Mac) on your keyboard.
3. Select Erase Authorization, then OK.
4. Try authorizing your computer again by going to Help > Authorize computer.

PLEASE HELP!