In the Documentation of the Player Detector the event which fires when a player clicks the block is not "chatEvent" it is "playerClick".

I want to add, that the real "chatEvent" only has the name "chat" as an event, I would suggest to also document it as such.

Furthermore the arguments of the function sendMessageToPlayer (ChatBox) are in the wrong order.

Here you can see it in action

Fixed, thank you for the report.