The project to be billed is associated with a delinquent billing account. While creating bucket.
It might be possible to see this message if you’ve disabled the (Google Cloud) Storage API on this project, and since that’s a quick thing to check, you should probably start there.
Aside from that, have you looked into the status of your trial billing account? As far as I understand, this error can happen if Google is uncertain whether you are actually the same person as whatever you used for identification in the setup process. You should double-check your email at the account administrator address, to see whether there are any relevant messages. But if you’ve tried everything and you’re still having trouble, you can contact billing support here.
Please let us know how things go for you!