Hello Jan,
Please post your ticket number here and I will make sure it gets handled asap.
As I wrote on another thread, the issue we have is that GrimeFighter sometimes (not in all cases) cannot recognize the network card or external wifi USB and therefore you get the error message you see. We are working on resolving that and in the meantime creating a blacklist of those network cards we know we have issues with so other users don't have the same frustration as you.
I know this doesn't help you much but I wanted to provide some background on why this is happening.
Regards