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!
You have caused a matchmaking connection failure 3 time(s)
I think it's linked to the DDOS issue. Give it time. The dev team here will eventually figure out a solution, or the person behind the attacks may at some point find something meaningful to do with their life.
