I have error in the shop for simulator?

I'm trying to make a shop but when I try to buy things in the store this error comes

script.Parent.MouseButton1Click:connect(function()
 local RS = game:GetService("ReplicatedStorage")
 local item =  RS:WaitForChild("Sword")
 local price = 0 -- Change Your Price Here
 local player = game.Players.LocalPlayer
 local stats = player:WaitForChild("leaderstats")

 if stats.Robux.Value == price then -- Change the Money to your Currency Name
  stats.Money.Value = stats.Money.Value - price
  local cloned = item:Clone()
  local cloned2 = item:Clone()
  cloned2.Parent = player.Backpack
  cloned.Parent = player.StarterGear
 end
end)

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