I'm trying to open a *.acsm file (resulting from the pruchase of an ebook) in the ADE. Unfortunately, I am unable to authorize my laptop when importing this file. I've tried with my AdobeID with the initial passord and then with a modifed one. But, I've got the message "ID or password not correct for this supplier. Try again".
I too am experiencing the same issue since yesterday. I changed my password to one with just Letters & Numbers and disabled two-factor authentication in my account and it worked. I was able to access the purchased .ascm file on a desktop.
Now while I am trying to access this on my Laptop after de-authorizing the desktop, I am getting an error stating that "You can only authorize this computer with an Adobe ID that hasn't been previously used to authorize any another computer or mobile devices. Please try again.".
Unfortunately there's no help available on the same on the support portal.