I have had to temporarily disable registration of new users to the Newsroom since there is an issue with the plugin that prevents (malicious) software agents from automatically subscribing. Until this is resolved, registration of new users will be disabled. In the meantime, subscriptions to the Newsroom can be done via email request. That is, send your details to firstname.lastname@example.org, and I will look to creating a Newsroom account for you. Sorry for the inconvenience.