"Http 404 (Bad Request)" When attempting to use a Discord webhook. Can someone help?

So I have came up with the idea to have a Roblox place that you can send messages to a discord server from. Only thing is, I am getting an http 404 error, I have used the Discord copy paste button so I don't think that it is a problem with the link. Here is the script

script.Parent.MouseButton1Click:Connect(function()
local http = game:GetService("HttpService")
local Data = {
    ["content"] = (TextBox.Text)
}

Data = http:JSONEncode(Data)

http:PostAsync("https://discordapp.com/api/webhooks/(placeholder for publication purposes)", Data)
end)

I have no idea what is going on, can someone help?

(edit) sorry im dumb, i cant format well lol

Im also getting a too many requests error, so I don't know if this is discord or roblox sided.