Ok, deleted the old file, joined a server, downloaded the mission, loaded.. aaaand... went right back to the server select screen. Again, no error messages or anything. Here's the new file.
http://temp-share.com/show/YgFHKwyfy
---------- Post added at 06:04 ---------- Previous post was at 05:26 ----------
Ok, I think I figured it out. There's something wrong with the BattleEye. Every time I try to join a new game, it says that BattleEye initiation has failed. Going to try reinstalling once again to see if that helps.