Is it ok if this datastore script doesn't work in studio but does in the actual game?

I've enabled API access to roblox studio btw, I am very confused how this is not working on studio but works on the actual game, might be cause I am changing the values through the explorer and properties tab and not through like some sort of script when I am in studio and when I am in the actual game I pull out the dev console and type command to give myself money that way..

local DS = game:GetService("DataStoreService")
local myDS = DS:GetDataStore("FlexingSimulatorDataStor")

local startingFlexCoins = 15

game.Players.PlayerAdded:Connect(function(plr)
    local leader = Instance.new("Folder",plr)
    leader.Name = "leaderstats"

    local stats = Instance.new("Configuration",plr)
    stats.Name = "Stats"

    local flexCoins = Instance.new("IntValue",leader)
    flexCoins.Name = "FlexCoins"

    local ego = Instance.new("IntValue",stats)
    ego.Name = "Ego"

    local key = "key - "..plr.UserId 

    local playerData = myDS:GetAsync(key)

    if playerData then
        flexCoins.Value = playerData[1] or startingFlexCoins
        ego.Value = playerData[2]
    else
        local valuesToSave = {flexCoins.Value,ego.Value}
        myDS:SetAsync(key,valuesToSave)
    end
end)

game.Players.PlayerRemoving:Connect(function(plr)
    local key = "key - "..plr.UserId
    local data = {
        plr.leaderstats.FlexCoins.Value,
        plr.Stats.Ego.Value,
    }

    myDS:SetAsync(key,data)
end)