The current pre-release of the client ("pioneer" in the version) is only compatible to itself. So you can only play with other testers. Please be aware!
@BuccalFlapper I think your issue is a different one, because you have:
warning: SofDec error: 1060102: Internal Error: adxm_goto_mwidle_border
which I have seen last year in this post. You can try the "temporary fix" so you can at least play the game, but without movie cutscenes.
