TAPAS has been experiencing technical difficulties due to a Drupal hack that occurred a few months ago. In order to block bots and spam content, we have to block temporarily all new users. We are manually unblocking authentic accounts. We apologize for this inconvenience and hope to resolve this issue soon. If you have any problems or if you are trying to sign up a class or group, please email us at info [at] tapasproject [dot] org. We are very sorry for this inconvenience and are grateful for your patience.