I tried to chat in game but it would not let me. The letters I type would show in the type box but when I press "enter" it just vanishes. It won't show up in the chat. I tried in general, whisper, party, guild, trade & even in world chat but nothing worked.
And it happened after the last maintenance on 28th Feb.
Its hard to play with out communication. So hope that there is a solution to this problem.