Board Game Arena

I have played 3 games so far today and no chatbox is available to me - after each game I see the other opponents had access to chatbox (the chatbox displayed then immediately disappeared) but I never had the ability to type in any of them. I played two hand and foot games and one Spite and Malice with same results. I signed out of board game arena in between games and checked back in but that did not solve the problem.

Are you using any extension or custom CSS that could be hiding the chatbox?

If you're playing on a desktop computer, it could be down to your browser's zoom level. Try holding down CTRL and adjusting the zoom with your mouse's scroll wheel and see if that makes any chat windows appear or disappear.