Mastrius, I think this is because your hosts file is missing.
Do this in a terminal:
Create the hosts file:
In the hosts file, type these entries:Code:sudo nano /etc/hosts
Press control+x to exit nano, and then hit y to save the file.Code:127.0.0.1 localhost 127.0.1.1 whatever-your-computers-name-is
The Administrative Application just means that it's an app that needs you to type in your password to run.