Ubuntu 12.04.4 LTS
yesterday, after update from 11.5 to 12.0, the panel (https://<domain>:8443/) show
404 Not Found - nginx
the log /var/log/sw-cp-server/error_log shows:
[warn] 1876#0: conflicting server name "" on 0.0.0.0:8443, ignored
[error] 1878#0: *1 "/usr/share/html/index.html"...