My webhook is saying the https is forbidden. Is there a way around this?

I was wondering if there was a way to get this script working?

local url = "https://discordapp.com/api/webhooks/486285105581785089/EC7e13TNSN9LGyWhPHr2a0FXu-r6rNm1X2LcZytCb5aip5gKLzkI0iMepDQWGIJ7JbFw" 
local http = game:GetService("HttpService")

game.Players.PlayerAdded:Connect(function(Player)
	local HookData = {
		['username'] = "SERVER",
		['content'] = "**" .. Player.Name .. " has joined.**"
	}
	HookData = http:JSONEncode(HookData)
	http:PostAsync(url, HookData)
	Player.Chatted:connect(function(Message)
		if Player.leaderstats.Rank.Value == "The Founder" then
			return nil
		end
		local HookData = {
			['username'] = "SERVER",
			['content'] = "***" .. Player.Name .. ": " .. "***" .. Message
		}
		HookData = http:JSONEncode(HookData)
		http:PostAsync(url, HookData)
	end)
end)

game.Players.PlayerRemoving:Connect(function(Player)
	local HookData = {
		['username'] = "SERVER",
		['content'] = "**" .. Player.Name .. " has left.**"
	}
	HookData = http:JSONEncode(HookData)
	http:PostAsync(url, HookData)
end)