lavakill, that was caused by the teamspeak server being down. That error will not show again. It will say something short like "Cannot query TS status" in the future.
Everything seems to be running again, apart from some config issues. In about 7 hours, our provider will be doing some hardware maintenance, interrupting power to our server for ~10 minutes, but we need to shut down the server before that and restart things after that so it might take a bit longer.
As for the maintenance done: enlarge user home dir disk, upgrade ubuntu to 14.04, datacenter power maintenance. The Ubuntu upgrade was painful, because VMware tools caused unjustified out-of-memory messages which broke the entire installation somewhere halfway, requiring for recovery. Let us know if there is anything that does not work as expected.