I looked for and couldn't find a thread on the website, please move as needed. I found
this thread which is closed and suggests posting in the App thread, but I don't have this problem in the App.
On a Mac, with Chrome, I get the 'We don't recognize this device' every time I log in. I have cleared cookies and browser history multiple times, restarted Chrome, and restarted the computer. I do not have the same problem with Safari, I do not have the same problem on the App. They let me log in with user name and password.
I think it started when I logged in once to my wife's account.