Why Isn't This Code Filtering Strings Properly?

Hi! I recently started trying to learn about how to create your own chat system so I chose to follow some tutorials. This one to be exact. I've followed every step and double checked everything but the thing is that even though it prints out the texts, it prints them out even if they are profane. And I don't know what I'm doing wrong. I know that there isn't anything wrong with the build in functions (obviously), so it has to be (I'm assuming) the way I use those functions.

I have a remote event in game.ReplicatedStorage

Local script:

--Local script

local textbox = script.Parent
local uis = game:GetService("UserInputService")
local sendMsg = game.ReplicatedStorage:WaitForChild("RemoteEvent")
textbox.FocusLost:Connect(function(text)
	sendMsg:FireServer(textbox.Text)
	textbox.Text = ""
end)



uis.InputBegan:Connect(function(key)
	if key.KeyCode == Enum.KeyCode.T then
		if textbox:IsFocused() == false then
		textbox:CaptureFocus()
		end
	end
end)

ServerScript:

--ServerScript

local sendMsg = game.ReplicatedStorage:WaitForChild("RemoteEvent")
local textService = game.TextService-- or game:GetService("TextService")


local function filterText(Input,player)
	local filteredtext
	local success, errorMessage = pcall(function()
		 filteredtext = textService:FilterStringAsync(Input, player)
	end)
	
	
		if success then
			return filteredtext
		elseif errorMessage then
			print("error: ",errorMessage)
		end
	return false
end

local function filteredText(filtertext)
	local filteredMessage
	local success, errorMessage = pcall(function()
		filteredMessage = filtertext:GetNonChatStringForBroadcastAsync()
	end)
	if success then
		return filteredMessage
	else
		print("error: ",errorMessage)
	end
	return false
end

local function isMessageValid(player, Message)
	if Message ~= "" then
		local messageObject = filterText(Message, player.UserId)
		local filteredMessageObj = ""
		 filteredMessageObj = filteredText(messageObject)
		print(filteredMessageObj)
		game.Workspace.Part.SurfaceGui.TextLabel.Text = filteredMessageObj
	end
end

sendMsg.OnServerEvent:Connect(isMessageValid)

Any help would be great.