This issue has now been identified and resolved.

This incident has now been identified and is affecting some functionality in the app. Thank you for your patience.

We are currently experiencing intermittent issues with the Curve app. We are investigating the root cause, but in the meantime you may be unable to access the application.
We understand that this is frustrating and we thank you for your patience while we investigate.

We will let you know as soon as the issue has been fixed.