Issue: Web Reporter could not be reached at UI and giving an error from browser - 503 Bad Gateway - page cannot be displayed; on the otherhand, it is still accessible through CLI via SSH
Cause: The "Preferences.cfg" file can become corrupted when a non-graceful shutdown occurs, like loss of power to the device.
Resolution: Restore last known good configuration on the Reporter through the CLI.
View the list of archived configuration files that are listed by date (year/month/day/hour/seconds).
Reporter# restore-settings list
Stop Reporter before applying the desired configuration file.
Apply the desired archive configuration file.
Reporter# restore-settings 20170703123052
Are you sure you want to replace your current settings with those from set 20170703123052? [y/N]