Issue with api licence checker script

[jaydeniamrich2 (NotKFC)]

My code:

local httpService = game:GetService("HttpService")
local groupService = game:GetService("GroupService")
local apiUrl = "http://##############/v1/check" -- hastagged for private reasons

local function GetOwnerID(): number
	if game.CreatorType == Enum.CreatorType.Group then
		return groupService:GetGroupInfoAsync(game.CreatorId).Owner.Id
	elseif game.CreatorType == Enum.CreatorType.User then
		return game.CreatorId
	end
end

--[[
local hubID = "66dd90712ffdabb307586249"
local productID = "lzksjl62tsgd6xttgwpkor8azb2d"
]]

local function Whitelist(hubId: string, productId: string, targetUserId: number?): boolean
	local UserID = GetOwnerID()

	if typeof(hubId) ~= "string" then error("hubId must be a string") end
	if typeof(productId) ~= "string" then error("productId must be a string") end
	if typeof(targetUserId) ~= "number" and targetUserId ~= nil then error("targetUserId must be a number") end

	local requestData = {
		hubID = hubId,
		productID = productId,
		robloxID = targetUserId
	}

	local requestBody = httpService:JSONEncode(requestData)

	local headers = {
		["Content-Type"] = "application/json"
	}

	local success, response = pcall(function()
		return httpService:PostAsync(apiUrl, requestBody, Enum.HttpContentType.ApplicationJson, false, headers)
	end)

	if success then
		local responseData = httpService:JSONDecode(response)

		if responseData.status == "200" then
			print("License is valid for user: " .. UserID)
			return true
		elseif responseData.status == "104" then
			warn("License is invalid for user: " .. UserID .. " - No whitelist found.")
			return false
		else
			warn("Unexpected response for user: " .. UserID)
			return false
		end
	else
		warn("Failed to check license for user: " .. UserID)
		return false
	end
end

Whitelist("66dd90712ffdabb307586249", "lzksjl62tsgd6xttgwpkor8azb2d")

it worksf ien but then outputs: “Failed to check license for user: 5719020886 - Server - Core_V2:55”

the server is up and runnign with0 errors, i can even access the url with the data in my browser. Can anyone help?

[Exozorcus]

print response and see what it returns

[jaydeniamrich2 (NotKFC)]

says “Failed to check license for user: 5719020886
Header “Content-Type” is not allowed! - Server - Core_V2:55”

[NyrionDev (Nyrion)]

Roblox doesn’t allow you to directly pass the content type through the headers dictionary, you need to do it through the third parameter of post which you’re already doing.