Chat GUI Help?

The chat works perfectly fine when only one person is in the server, when there is more than one person the script does not run past line 62/84(depending on whether or not I am the one chatting). It allows you to chat once but it'll only show up for you and then it will refuse to run past line 62/84 when it's supposed to be putting the message in the other people's PlayerGuis. I am not sure how I'd fix this, it must have something to do with the WaitForChild() or the for loop. Anybody have any ideas how to fix this problem? There was no output other than the prints

wait(1)
player = game.Players.LocalPlayer
chat = player.PlayerGui.FalseChat
posted = 0
disabled = false
running = false
local entered = nil

function NewLine(enterPressed)
	if running == false and chat.Enter.Visible == true then
		running = true
		if (enterPressed) then
			entered = chat.Enter.Text
			if posted >= 4 and disabled == false then
				chat.Enter.Visible = false
				chat.Shadow.Visible = false
				local newestmsg = game.Lighting.ServerMessage:Clone()
				disabled = true
				newestmsg.Message.Text = "[SERVER]: Your chat has been disabled for 60 seconds because you were chatting too quickly."
				if chat.Chat:FindFirstChild("OldMsg", true) then
					chat.Chat.OldMsg.Name = "OlderMsg"
				end
				wait()
				if chat.Chat:FindFirstChild("NewMsg", true) then
					chat.Chat.NewMsg.Name = "OldMsg"
				end
				wait()
				newestmsg.Name = "NewMsg"
				newestmsg.Parent = chat.Chat
				for i = 1, 60 do
					wait(1)
					running = true
					entered = nil
				end
				chat.Enter.Visible = true
				chat.Shadow.Visible = true
				local newermsg = game.Lighting.ServerMessage:Clone()
				disabled = false
				newermsg.Message.Text = "[SERVER]: Your chat has been reactivated. Please chat slower."
				if chat.Chat:FindFirstChild("OldMsg", true) then
					chat.Chat.OldMsg.Name = "OlderMsg"
				end
				wait()
				if chat.Chat:FindFirstChild("NewMsg", true) then
					chat.Chat.NewMsg.Name = "OldMsg"
				end
				wait()
				newermsg.Name = "NewMsg"
				newermsg.Parent = chat.Chat
			end
			if chat.Enter.Text == "Click here or push '/' to talk..." or chat.Enter.Text == " " or chat.Enter.Text == "" or chat.Enter.Text == nil then
				entered = nil
				running = false
			elseif entered ~= nil and disabled == false and posted < 4 then
				if string.len(entered) <= 100 then
					if entered ~= nil and chat.Enter.Visible == true then
						posted = posted + 1
						if player.Name == "FearMeIAmLag" then
							for i, v in pairs(game.Players:GetChildren()) do
								wait()
								print("begin waiting")
								local chat = v:WaitForChild("PlayerGui").FalseChat.Chat
								local newestmsg = game.Lighting.OwnerMessage:Clone()
								print("Cloned")
								newestmsg.Message.Text = player.Name..": "..entered
								if chat:FindFirstChild("OldMsg", true) then
									chat.OldMsg.Name = "OlderMsg"
									chat.NewMsg.Name = "OldMsg"
								end
								wait()
								if chat:FindFirstChild("NewMsg", true) then
									chat.NewMsg.Name = "OldMsg"
								end
								wait()
								newestmsg.Name = "NewMsg"
								print("posting")
								newestmsg.Parent = chat
							end
							print("Completed copying")
						else
							for i, v in pairs(game.Players:GetChildren()) do
								wait()
								print("begin waiting")
								local chat = v:WaitForChild("PlayerGui").FalseChat.Chat
								local newestmsg = game.Lighting.UserMessage:Clone()
								newestmsg.Message.Text = player.Name..": "..entered
								if chat:FindFirstChild("OldMsg", true) then
									chat.OldMsg.Name = "OlderMsg"
									chat.NewMsg.Name = "OldMsg"
								end
								if chat:FindFirstChild("NewMsg", true) then
									chat.NewMsg.Name = "OldMsg"
								end
								wait()
								newestmsg.Name = "NewMsg"
								newestmsg.Parent = chat
							end
							print("Completed copying")
						end
						chat.Enter.Text = "Click here or type '/' to talk..."
					end
				else
					chat.Enter.Text = "There is a 100 character limit..."
					wait(5)
					chat.Enter.Text = "Click here or push '/' to talk..."
				end
			end
		end
		chat.Enter.Text = "Click here or push '/' to talk..."
	end
	running = false
	entered = nil
end

chat.Chat.ChildAdded:connect(function()
	if chat.Chat:FindFirstChild("NewMsg", true) then
		chat.Chat.NewMsg.Message.Size = UDim2.new(0, 350, 0, chat.Chat.NewMsg.Message.TextBounds.Y)
		wait()
		if chat.Chat:FindFirstChild("OldMsg", true) then
			chat.Chat:TweenSize(UDim2.new(0, 400, 0, chat.Chat.Size.Y.Offset + chat.Chat:FindFirstChild("OldMsg").Message.Size.Y.Offset + 2), "Out", "Quad", .5, false)
			chat.Chat:TweenPosition(UDim2.new(0, 20, 0, -chat.Chat.Size.Y.Offset + 124 - chat.Chat:FindFirstChild("OldMsg").Message.Size.Y.Offset), "Out", "Quad", .5, false)
		end
		if chat.Chat:FindFirstChild("OldMsg", true) then
			chat.Chat.NewMsg.Position = UDim2.new(0,0,0, chat.Chat:FindFirstChild("OldMsg").Position.Y.Offset + chat.Chat:FindFirstChild("OldMsg").Message.Size.Y.Offset + 2)
		else
			chat.Chat.NewMsg.Position = UDim2.new(0,0,0,0)
		end
		wait()
		print("posted")
	end
end)

chat.Enter.FocusLost:connect(function(enterPressed)
	if disabled == false and running == false and chat.Enter.Visible == true then
		NewLine(enterPressed)
	end
end)

player:GetMouse().KeyUp:connect(function(key)
	if string.char(47) == key then
		chat.Enter:CaptureFocus()
	end
end)

--[[game.Players.ChildAdded:connect(function(newPlayer)
	local newestmsg = game.Lighting.ServerMessage:Clone()
	disabled = true
	newestmsg.Message.Text = "[SERVER]: "..newPlayer.Name.." has joined the server!"
	if chat.Chat:FindFirstChild("OldMsg", true) then
		chat.Chat.OldMsg.Name = "OlderMsg"
	end
	wait()
	if chat.Chat:FindFirstChild("NewMsg", true) then
		chat.Chat.NewMsg.Name = "OldMsg"
	end
	wait()
	newestmsg.Name = "NewMsg"
	newestmsg.Parent = chat.Chat
end)

game.Players.ChildRemoved:connect(function(newPlayer)
	local newestmsg = game.Lighting.ServerMessage:Clone()
	disabled = true
	newestmsg.Message.Text = "[SERVER]: "..newPlayer.Name.." has left the server"
	if chat.Chat:FindFirstChild("OldMsg", true) then
		chat.Chat.OldMsg.Name = "OlderMsg"
	end
	wait()
	if chat.Chat:FindFirstChild("NewMsg", true) then
		chat.Chat.NewMsg.Name = "OldMsg"
	end
	wait()
	newestmsg.Name = "NewMsg"
	newestmsg.Parent = chat.Chat
end)]]

while wait(5) do
	if posted > 0 then
		posted = posted - 1
	end
end

I did something like this, instead I made a Frame that needs to be duplicated on each player's PlayerGui. I think the problem is that you're running the code inside a LocalScript, that means the script cannot access entirely to all the players, you need to send the NewChatLine from a Server Side script, because it's the server that receives the message, not the player. I repeat that I made something like this in a LocalScript, it didn't work, then I did it in a NormalScript and it works! :) Try that! Also it's better to use "player.userId" instead of "player.Name", because if you change it (and then spend 1k R$) you need to update the place just for your name, the userId will be the same forever!