Oh, if you are interested in more details about the specific error, it is related to nginx, a reverse proxy used on the netsblox deployment. It is responsible for connecting traffic to the various subdomains (such as community.netsblox.org, editor.netsblox.org, etc) to the appropriate local applications. When the netsblox server application is not running and nginx receives a request to editor.netsblox.org, it returns the bad gateway error.