Post console.log.Does this happen across all servers, or only yours?
Try typing "/teamMessageSent hi" into chat. There's no reason this shouldn't work, but try it anyway.
Oh, I misread your earlier message. I thought you said you reinstalled the game without any client add-ons, not you reinstalled the game and left your client add-ons in the folder.Add-ons are the source of all problems. Chop out the ones that you don't use often. If it's still a problem, keep cutting until it's solved.