I have a similar problem with the Open-E DSS lite just like HofMar. The installation on an USB-Stick, the configuration of the IP-Address, Pings from outside/inside and the console don't cause any trouble, but if I try to connect on the webgui with https, it only shows a blank screes after accepting the certificat.
This occurs on Windows as well as on Linux with all kinds of Browsers (Firefox, IE, Opera, etc.)