when im filling in the codes i added it keeps saying invalid code?

this is my first script it is in serverscriptservice and the script is called Twittercodes

local DataStoreService = game:GetService("DataStoreService")

local TwitterCodes = {
    Free = {"Coins", 100},
    Pet = {"Coins", 100000}
}

game.ReplicatedStorage.RedeemCode.OnServerInvoke = function(Player, Code)
    local TwitterCodeStore = DataStoreService:GetDataStore("TwitterCodesStore2" .. Code)
    local PlayerRedeemedCode = TwitterCodeStore:GetAsync(Player.UserId)

    if TwitterCodes[Code] and not PlayerRedeemedCode then
        local LeaderboardValueName = TwitterCodes[Code][1]
        local AmountToGivePlayer = TwitterCodes[Code][2]
        local LeaderboardValue = Player.leaderstats[LeaderboardValueName]

        LeaderboardValue.Value = LeaderboardValue.Value + AmountToGivePlayer
        TwitterCodeStore:SetAsync(Player.UserId, true)

        return true
    else
        return false
    end
end

this is my second script it is in startegui and then in a frame the scipt is called TwitterCodesScript

local RedeemFrame = script.Parent.RedeemFrame
local CodeBox = RedeemFrame.CodeBox
local RedeemButton = RedeemFrame.RedeemButton
local ToggleButton = script.Parent.ToggleButton

ToggleButton.MouseButton1Click:Connect(function()
    RedeemFrame.Visible = not RedeemFrame.Visible
end)

RedeemButton.MouseButton1Click:Connect(function()
    local Code = CodeBox.Text
    local Redeemed = game.ReplicatedStorage.RedeemCode:InvokeServer(Code)

    if Redeemed == true then
        CodeBox.Text = ""
        CodeBox.PlaceholderText = "Redeemed Code!"
        wait(1)
        CodeBox.PlaceholderText = "Twitter Code Here"
    else
        CodeBox.Text = ""
        CodeBox.PlaceholderText = "Invalid Code"
        wait(1)
        CodeBox.PlaceholderText = "Twitter Code Here"
    end
end)

if you need to know anything more to answer my question please ask it i will add it then