I’ve not been able to download and/or fight any challenges today – as well as not being able to play my campaign. Below is a copy of an error message I finally got during my campaign after a fair amount of time:
Failed to upload fleet as challenge:…\src\SIM_FleetUploader.cpp 125
I think it might be that your Internet Service Provider can not access the Positech Server at this point in time.
For the main reason that I have managed to play both Campaign and On-line challenges.
Mind you this is only a theory, if someone in Maveth neck of the woods could verify they can play Campaign and/or On-line challenges, that would be fantastic.