Not able to login to email launched instructables?

Why when I try to login while looking at instructables launched from email that, even though they require a Pro Membership, which I do have, they won't allow me to log into them? I noticed that https://www.instructables.com/id/... leads their path.?

Kiteman6 years ago
All published Instructables are prefaced by https://www.instructables.com/id in their urls.

This may simply be a matter of saved/unsaved cookies?