Inferno Program Edition v1.9 has been retired from https://inferno.healthit.gov and is being replaced by the ONC Certification (g)(10) Standardized API Test Kit v2.2.
You may continue to run Inferno Program Edition locally, by downloading it from the Github repository.
Feedback on this transition can be provided to ONC via the ONC feedback portal. Please begin testing using v2.2 or later, and report any issues to help ensure a smooth transition. More information is available in the v2.0 release notes.