Error with saving script?

I need help with s=a script that is supposed to save player data. I keep getting this Error

" Cannot write to DataStore from studio if API access is not enabled. Enable it by going to the Game Settings page."

I could not find API access in the settings.

This is the ServerScriptService Script

local PlayerStatManager = require(game.ServerStorage.ModuleScript)

This is ServerStorage Script

local PlayerStatManager = {}

local DataStoreService = game:GetService('DataStoreService')
local playerData = DataStoreService:GetDataStore('PlayerData')

local AUTOSAVE_INTERVAL = 60

local sessionData = {}

function PlayerStatManager:ChangeStat(player, statName, changeValue)
    sessionData[player][statName] = sessionData[player][statName] + changeValue
end

local function getPlayerData(player)    
    return playerData:GetAsync(player.UserId)
end

local function savePlayerData(player)   
    playerData:SetAsync(player.UserId, sessionData[player])
end

local function setupPlayerData(player)
    local data = playerData:GetAsync(player.UserId)
    if not data then
        sessionData[player] = {Money = 0}       
        savePlayerData(player)
    else
        sessionData[player] = data
    end
end

local function autosave()
    while wait(AUTOSAVE_INTERVAL) do
        for player, data in pairs(sessionData) do
            savePlayerData(player)
        end
    end
end

game.Players.PlayerAdded:connect(setupPlayerData)

game.Players.PlayerRemoving:connect(function(player)
    savePlayerData(player)
    sessionData[player] = nil
end)

spawn(autosave)

return PlayerStatManager