Error Message: SBCGLOBAL.NET login when adding wireless number

I received a new password for my Currently account (sbcglobal.net), and it prompts me to add a mobile #. When logging in. I add it, get the verification code, enter it, and get the error message:

Hmm….something went wrong
It’s not you, it’s us. We hit a snag and can’t complete your request right now. You can try again later by going to your profile and updating the information.

I first attempted all of the recommendations on clearing cookies, cache, etc, and have tried Safari, Edge, Chrome, and same issue. Then I was on with Technical Support for an hour trouble shooting and no luck. Support said the Carrier of the wireless number should not matter, in my case is not ATT.

I was told that perhaps the account was locked during a breach a month or so ago, and they attempted to unlock it, but no luck again.

Anyone have luck?