Yep, that was it. I now have re-enabled it with an authenticator app. Set up is at https://twitter.com/settings/account/login_verification https://twitter.com/

Yep, that was it. I now have re-enabled it with an authenticator app. Set up is at https://twitter.com/settings/account/login_verification https://twitter.com/settings/account/login_verification if anyone else needs the link.