Cannot add Adobe ID to NOOK Glowlight 4 Plus

When I try to add my Adobe ID to NOOK so I can use ADE, I don’t get any error messages but the ID never shows up as being on my account. I contacted NOOK support and all they would do is tell me to contact ADE. As far as I can tell, posting on this community is the only way to contact any ADE support, so I’m doing it mostly just to tell B&N that I did what they said since I don’t expect anyone here can fix a problem that almost certainly is in the NOOK. It’d be great if I turn out to be wrong, though...