[Russell Sobie]

I'll bet you are using Content Manager as a launcher. The "undefined" thing I think is a bug with that software (which the maker knows about, but has not yet addressed). If you try viewing the race settings using the regular AC launcher and the SRS app within it, that "undefined" might clue you into what you are missing. If you've downloaded everything for it, and installed them all correctly, then you should be able to join. If this was today, you specifically needed the Ginetta car and the Donington Park track. So if you are able to drive around in a Ginetta off line on the Donington Park track, then I have no idea what is wrong. But my guess is that one of those two is not installed correctly.