Disabling/Configuring the Chat Box

[blokav]

It looks like Roblox removed the option to enable/disable classic and bubble chat in the game options. I found this post a few months ago when I had the same issue:

Changing chat type and other chat settings without forking

The Legacy Chat System (formerly Lua Chat System) is deprecated and no longer officially supported by Roblox. This tutorial is for the last-supported version of the Legacy Chat System. For all new work, please refer to the TextChatService documentation for rough equivalents. If you’re new here, I encourage reading through the preface introducing the method of changing chat settings. If not and you want to skip to the settings, here’s a list of all the sections! Chat Behaviour: General setti…

This part was most useful to me:

Let’s change our game’s chat type to Bubble Chat for our example. In a LocalScript preferably under ReplicatedFirst, set this up:

local Chat = game:GetService("Chat")

Chat:RegisterChatCallback(Enum.ChatCallbackType.OnCreatingChatWindow, function()
    return {
        ClassicChatEnabled = false,
        BubbleChatEnabled = true,
    }
end)

Hope this helps.