Chat in game dont work. When i push T  (this key is add to activate chat i check)  i go t command: Cannot send chat message

1. I have settings right its set to:  Chat:  Shown
2. I try on 3 other servers is the same problem
3. On single player chat works good
4. on other launcher  (tLauncher)  works good
5. i delete game and install again.... still dont work

only chat dont work with oryginal launcher in multiplayer mode