Just faced the same issue and it is now resolved. It's not really a fix, it was more about understanding what the situation is.
The previous account you used, with the same email, was most likely a Personal Account. The new one may be linked to a org (work or school account).
Here are the steps that were taken:
- Open up the dev.azure page that you had access to previously and sign in to your acount on portal.azure.com
- Once you're logged in and on the homepage, select the org name/profile picture on the top right of your screen and sign in with a different account
- Sign in to your account and it should show a popup saying that there are 2 accounts with the email address.
- Select the personal account and you should be able to access it
This isn't the best solution, but it did work.