I have tried over and over again to combine the accounts without success. I click on "get started" from my Marriott account, and I get a message that says "sign in to verify your SPG account". I assume it wants my SPG credentials. I enter them (the new SPG account number I got when I logged in on Monday for the first time since the merger) , and all I get is a message saying "The content could not be loaded".

What am I doing wrong?