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!
Btw we found a new bug now where if you’re playing with someone in your clan, and your clan tag has a non-ascii character in it, then your matches will fail to start.
Luckily this is relatively unlikely to happen.
@Malkerian tap on play-matchmaking-under the <2v2> or <1v1> there's a big grey button called <map pool>,tap on it,download everything that looks like a closed box
