Rather Upsetting Problem.

Well, there was a problem like this where i happened to anyone wanting to play Spy Hunt. If you wanted to join a game where it has 8 or more people you wouldn't be able to play. This glitch might've occurred with fireteam cabin fever. Try starting a room yourself or reinstall CA.

Sorry to hear your having troubles with cabin fever, A lot of people are having these problems. I tried browsing around and asking friends and there have been no fixes. I had trouble patching so i copied the files from my friend. LOL. If you've reinstalled i don't think its a corrupted file, if i find anything new I'll PM you.

There probably isn't a reason why this should work but maybe ask a friend you know that has CA to give you the files, preferably go to their house and copy the Nexon folder. (Someone you know irl and lives close)

You should wait untill there is a new patch or try what shoking said, he copied the files from his friend if that does not work then i have no idea.

REINSTALL!