PointsService requires LoadString to be disabled error?

I have no idea what LoadString is and this is my first time working with points.

This is my script;

local button = script.Parent
local AdPlaying = button.Parent:WaitForChild("AdPlaying")
local AdFrame = button.Parent.Parent:WaitForChild("AdFrame")
local PlayerPoint = game:GetService("PointsService")
local Amount = button.Parent:WaitForChild("AdValue").Value
local player = game.Players.LocalPlayer

button.MouseButton1Down:connect(function()
    if AdPlaying.Value == true then
        AdPlaying.Value = false
        AdFrame:TweenPosition(UDim2.new(0, -500,0, 100),'In','Sine',0.5)
        PlayerPoint:AwardPoints(player.UserId,Amount)
    end
end)

The error is on line 12. Please help!