Why does my Custom Chat only work in studio?? HttpService is enabled

I'm trying to make a custom chat and it seems to be successful but it only works in studio? Why? Here's what the setup looks like https://ibb.co/mYZ4i5

Here's the code for the "ChatServer" script

local RepStorage = game:GetService'ReplicatedStorage'

local ChatEvent  = RepStorage:WaitForChild'ChatRemote'

local HttpService = game:GetService("HttpService")

local function filterMessage(message)
		return HttpService:GetAsync("http://www.purgomalum.com/service/plain?text="..message, true)
end

ChatEvent.onServerEvent:connect(function(Client, Request, Value)
	Request:lower()
	if Request == "chat" then
		local filteredMessage = filterMessage(Value)
		ChatEvent:FireAllClients("chat",filteredMessage,Client.Name)
	end
end)

Here's the code for the "ChatClient" localscript

local RepStorage = game:GetService'ReplicatedStorage'
local Players    = game:GetService'Players'
local StarterGui = game:GetService'StarterGui'

local ChatEvent = RepStorage:WaitForChild'ChatRemote'

local Client = Players.LocalPlayer
local Mouse  = Client:GetMouse()

local Chatbar   = script.Parent
local ChatFrame = script.Parent.Parent.Frame

local Chats = {}

local function PushMessages(Size)
	for i,v in pairs(Chats)do
		v.Position = v.Position - UDim2.new(0,0,0,Size)
		if v.Position.Y.Offset < -ChatFrame.AbsoluteSize.Y then
			Chats[i] = nil
			v:Destroy()
		end
	end
end

local function CreateMessage(Message,Speaker)
	local Label = Instance.new'TextLabel'
	Label.BackgroundTransparency = 1
	Label.TextXAlignment         = 'Left'
	
	Label.TextColor3 = Color3.new(1,1,1)
	
	Label.Font     = "ArialBold"
	Label.FontSize = Enum.FontSize.Size18
	Label.Size     = UDim2.new(1,0,0,25)
	Label.Position = UDim2.new(0,0,1,-25)
	Label.Text = tostring(Speaker)..": "..Message
	PushMessages(Label.Size.Y.Offset)
	Chats[#Chats+1] = Label
	Label.Parent = ChatFrame
	Label.TextScaled = true
	Label.TextWrapped = true
end

Mouse.KeyDown:connect(function(Key)
	if Key:byte() == 47 then
		Chatbar:CaptureFocus()
	end
end)

Chatbar.FocusLost:connect(function(Enter)
	if Enter then
		if Chatbar.Text == '' then
			return
		end
		ChatEvent:FireServer("chat",Chatbar.Text)
		Chatbar.Text = ''
	end
end)

ChatEvent.OnClientEvent:connect(function(Request, Message, Speaker)
	Request = Request:lower()
	if Request == "chat" then
		CreateMessage(Message, Speaker)
	end
end)

StarterGui:SetCoreGuiEnabled(Enum.CoreGuiType.Chat, false)