I cant see the problem? (Position is not a valid member of LocalScript)

So i was trying to make a custom chat, there are 2 scripts, the other in ServerScriptService is working alright, but the script inside the chat is not, its the script that shows the message.

SCRIPTS:

The Faulty Script:

local Player = game.Players.LocalPlayer
local OriginalText = "Click here or press '/' to send a message"
local Chat = script.Parent
local ChatFrame = script.Parent.MainCustomChatWindow
local ChatBar = script.Parent.MainCustomChatWindow.SendChatFrame.PlayerSendBox
local Frame = script.Parent.MainCustomChatWindow.PlayerTextBoxHolder
local UIS = game:GetService("UserInputService")
if UIS.TouchEnabled then
	OriginalText = OriginalText
	ChatBar.Text = OriginalText
end
UIS.InputBegan:Connect(function(Input, GameProcessed)
	if GameProcessed then return end
	if Input.KeyCode == Enum.KeyCode.Slash then
		ChatBar:CaptureFocus()
	end
end)
local function ChatFunction(Message)
	game.ReplicatedStorage.Message:FireServer(Message)
end
ChatBar.FocusLost:Connect(function(EnterPressed)
	if EnterPressed then
		local Message = ChatBar.Text
		if Message:len() > 0 then
			ChatFunction(Message)
		else
				if Message:lower() == Message:upper() and Message ~= "" and Message ~= " " and Message ~= "  " and Message ~= "   " and Message ~= "    " and Message ~= "     " and Message ~= "      " and Message ~= "       " then
					ChatFunction(Message)
				end
		end
	end
	ChatBar.Text = OriginalText
end)
ChatFrame.MouseEnter:Connect(function()
	ChatBar.BackgroundTransparency = 0
	Frame.BackgroundTransparency = 0
	for i=1,5 do
		ChatBar.BackgroundTransparency = ChatBar.BackgroundTransparency + 0.04
		Frame.BackgroundTransparency = Frame.BackgroundTransparency + 0.04
		wait()
	end
	ChatBar.BackgroundTransparency = 0.77
	Frame.BackgroundTransparency = 0.77
end)
ChatFrame.MouseLeave:Connect(function()
	ChatBar.BackgroundTransparency = 0.77
	Frame.BackgroundTransparency = 0.77
	for i=1,5 do
		ChatBar.BackgroundTransparency = ChatBar.BackgroundTransparency - 0.04
		Frame.BackgroundTransparency = Frame.BackgroundTransparency - 0.04
		wait()
	end
	ChatBar.BackgroundTransparency = 0
	Frame.BackgroundTransparency = 0
end)
game.ReplicatedStorage.Message.OnClientEvent:Connect(function(Message)
	local i = Instance.new("TextLabel",Frame)
	i.Size = UDim2.new(1,0,0.1,0)
	i.TextScaled = false
	i.BackgroundTransparency = 1
	i.Font = Enum.Font.SciFi
	i.TextStrokeTransparency = 0
	i.TextColor3 = Color3.new(235,235,233)
	i.Name = "Chat"
	i.Text = Message
	i.TextXAlignment = Enum.TextXAlignment.Left
	i.TextYAlignment = Enum.TextYAlignment.Top
	local t = Frame:GetChildren()
	Frame:ClearAllChildren()
	if #t > 10 then
		table.remove(t,1)
	end
	for c,v in pairs(t) do
		local l = v:Clone()
		l.Position = UDim2.new(0,0, (c-1)*0.1,0)
		l.Parent = Frame
	end
end)

It is inside the ScreenGui of the Chat, not inside the ChatFrame so script.Parent = ScreenGui

It is probably cloning itself and trying to find Position on it, which does not exist but I don't know how to fix it or why it is happening

It is having errors at line 75: l.Position = UDim2.new(0,0, (c-1)*0.1,0)

This is a LocalScript

And the other script:

local ReplicatedStorage = game.ReplicatedStorage
local MessageEvent = ReplicatedStorage.Message
local APrefix = [[/]]
local Owners = {"166660143", "260932086"}
local Admins = {"166660143", "260932086", "1466856081", "310333010"}
local function IsOwner(p)
	local n = p.UserId
	for _,v in pairs(Owners) do
		if v == n then
			return true
		end
	end
	return false
end
local function isAdmin(p)
	local n = p.UserId
	for _,v in pairs(Admins) do
		if v == n then
			return true
		end
	end
	return false
end
local function Chat (p,m)
	local Name = p.Name
	local Message = game.Chat:FilterStringForBroadcast(m,p)
	local Nick = p:FindFirstChild("Nickname") if Nick then Name = p.Nickname.Value end
	local Prefix = p:FindFirstChild("Prefix") if Prefix then Name = "["..p.Prefix.Value.."]"..Name end
	for _,v in pairs(game.Players:GetPlayers()) do
		if not v:WaitForChild("Muted"):FindFirstChild(p.Name) then
			MessageEvent:FireClient(v,Name..": "..Message:sub(1,50))
		end
	end
end
local function SPM(p,m)
	MessageEvent:FireClient(p,"SERVER: "..m)
end
local function SM(m)
	MessageEvent:FireAllClients("SERVER: "..m)
end
local function RAW(m)
	MessageEvent:FireAllClients(m)
end
local function PRAW(p,m)
	MessageEvent:FireClient(p,m)
end
local function Whisper(p,v,m)
	local Name = p.Name
	local Message = game.Chat:FilterStringForBroadcast(m,p)
	local Nickname = p.FindFirstChild("Nickname") if Nickname then Name = p.Nickname.Value end
	local Prefix = p:FindFirstChild("Prefix") if Prefix then Name = "["..p.Prefix.Value.."]"..Name end
	if v:WaitForChild("Muted"):FindFirstChild(p.Name) then
		PRAW(p,v.Name.." has muted you!")
	else
			PRAW(p, "Message Sent To "..v.Name)
			PRAW(v,"From "..Name..": "..Message:sub(1,40))
	end
end
MessageEvent.OnServerEvent:Connect(function(p,m)
	if m:sub(1,6):lower() == "/mute " then
		m=m:sub(7)
	elseif m:sub(1,8):lower() == "unmute " then
		m=m:sub(9)
	elseif m:sub(1,3):lower() == "/w" then
		m=m:sub(4)
	elseif m:sub(1,1) == APrefix and isAdmin(p) then
		m=m:sub(2)
	else
		Chat(p,m)
	end
end)

game.Players.PlayerAdded:Connect(function(p)
	local mutedfolder = Instance.new("Folder",p)
	mutedfolder.Name = "Muted"
end)

Which appears to have no errors at all and is a normal Script

Try this, starting on line 73:

            for c,v in pairs(t) do
	        if v:IsA("GuiObject") then -- checks if it is a gui object.
			local l = v:Clone()
	        	l.Position = UDim2.new(0,0, (c-1)*0.1,0)
	        	l.Parent = Frame
		end
	    end

This checks if the value returned in "v" is an Instance that is a GuiObject (basically a TextBox, a TextLabel, anything, whether it is 3D or 2D)

I assume this is because you have other scripts in the frame? (I might be wrong.)