Receiving Data is a issue while attempting to login to a overloaded / thread blocked server. It is a common issue in Arma 3 where Join In Progress data can become corrupt. While usually restarting the game can help in most situations you will need to contact an admin in Teamspeak to restart the server for you in help desk. If there are no admins online you will have to play on another server for the time being.
This bug only effects players logging in. Any other players that are already in-game won't experience the issue.