Filtering String Async not working? instead saying 2nd argument is missing??

I made a script that prevents scammers from scamming other players, I'm going to add more filter stuff in the table soon.

It's saying that the 2nd argument is missing on the last line aka. :FilterStringAsync()

local txtservice = game:GetService("TextService")

local filterWhiteboard = {"robux.gg", "free robux"}

game.Players.PlayerAdded:Connect(function(player)
	player.Chatted:Connect(function(msg)
		for _, v in ipairs(filterWhiteboard) do
			if string.lower(msg) == v then
				
				txtservice:FilterStringAsync(msg)
			end
		end
	end)
end)

FilterStringAsync has 3 parameters, but you only added 1.

1. StringToFilter

local textService = game:GetService("TextService")

local message = "Hello World!" -- the string to filter

textService:FilterStringAsync(message) 

1. FromUserId

local textService = game:GetService("TextService")

game.Players.PlayerAdded:Connect(function(player)
    player.Chatted:Connect(function(message)
        textService:FilterStringAsync(message,player.UserId)
    end)
end)

1. TextContext

(optional)

local textService = game:GetService("TextService")

game.Players.PlayerAdded:Connect(function(player)
    player.Chatted:Connect(function(message)
        textService:FilterStringAsync(message,player.UserId,Enum.TextFilterContext.PublicChat)
    end)
end)

Edited code:

local txtservice = game:GetService("TextService")

local filterWhiteboard = {"robux.gg", "free robux"}

game.Players.PlayerAdded:Connect(function(player)
    player.Chatted:Connect(function(msg)
        for _, v in ipairs(filterWhiteboard) do
            if string.lower(msg) == v then

                txtservice:FilterStringAsync(msg, player.UserId)
            end
        end
    end)
end)

Also, your code is detecting if their chat is only robux.gg or free Robux, so use string.find.

local txtservice = game:GetService("TextService")

local filterWhiteboard = {"robux.gg", "free robux"}

game.Players.PlayerAdded:Connect(function(player)
    player.Chatted:Connect(function(msg)
        for _, v in ipairs(filterWhiteboard) do
           if string.find((string.lower(msg), v) then
                txtservice:FilterStringAsync(msg, player.UserId)
            end
        end
    end)
end)

FilterStringAsync has 3 parameters: stringToFilter: the strings you want to filter.

playerFrom: the player that sent the text.

playerTo: (This one I got from devforum wiki) The intended recipient of the provided text; use the author if the text is persistent.

So basically, you need to enter the player in the playerFrom argument, just like so:

-- filterstringasync is deprecated in local scripts, so we doing it in a server script
local txtservice = game:GetService("TextService")

local filterWhiteboard = {"robux.gg", "free robux"}

game.Players.PlayerAdded:Connect(function(player)
    player.Chatted:Connect(function(msg)
        for _, v in ipairs(filterWhiteboard) do
            if string.lower(msg) == v then

                txtservice:FilterStringAsync(msg,player) -- added the player argument from PlayerAdded
            end
        end
    end)
end)

I hope this answered your question!