Post the same info on Dec 14 Post 42, and confirmed it was working Post 44, in this very thread. I basically poked around after the initial way died. It has not been dead, but is under disguise!

See the bottom of Post 42. Note - there is also Request Card Agreement from the Customer Service drop down menu - that would NOT lead you to the SM but pull up an online email form for the purpose.
You must go thru the cumbersome way thru the side bar of the Request Credit Increase. It is at the same location as the previous "Email Customer Service" which was replaced by the "Request Customer Agreement" but the underlying redirection has not been changed, yet.

https://www.flyertalk.com/forum/30532133-post42.html

Also Ed Janowsky gave a precise steps on Dec 18 Post 50.

https://www.flyertalk.com/forum/30548070-post50.html

I thought everyone has known about this twist happened 2 weeks ago...