There's various reasons for this error message - most common is having an "unverified" account. Another reason can be a linked credit card that has expired. Additionally, your account profile may not be completely setup. And sometimes one can encounter a system glitch.
If all of the above is OK with your Account, then try deleting your web browser's cookies, temp files and history, then close the browser, reopen it and retry.
You can also try using a different web browser or if available, another computer.
As a last resort for assistance, suggest that you follow-up with customer support with your concerns as they can check out a few things for you.
