My Ingame Chat is Blank

[Admiral 8Q]

I lost my ingame chat. How do I get back Nation/Help/Global?
My chat box is there, I just can't seem to open any "chat-rooms" so to speak.

[Galileus]

The '+' button on the top right.

[Ink]

There are two possibilities, one is that you closed it by yourself, then follow the tip given by Galileus. Second - you caught a chat bug, the issue is known and most likely will be fixed the next week