Some of the Chicago servers are being taken down for updates. You may be disconnected from the service during this maintenance if you are signed in to an affected server. If you are disconnected, you should be able to immediately reconnect to unaffected servers in the cluster.
Also, for the next 12 minutes, you will not be able to generate new configuration files.
Edit: All Chicago services have been fully restored. The ability to generate new config files has also been restored.