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!
@lim13354 said in Help plz:
java.util.concurrent.CompletionException: java.io.FileNotFoundException: https://content.faforever.com/maps/x1ca_coop_001.zip
That should be FA Mission 1 - Black Day, either download it from Uveso links or use the coop tab in the FAF launcher.
Source is here.
