I am having problems with FilteringEnabled?

Hi, when I turn on FilteringEnabled, all my scripts' (Both Scripts and LocalScripts) written code turned to

4

before all written code turned to 4. this is what my script is.

local plr = game.Players.LocalPlayer.leaderstats
local name = game.Players.LocalPlayer.Character
local backpack = game.Players.LocalPlayer.Backpack
script.Parent.MouseButton1Click:Connect(function()
    if plr.Coins.Value +1500 then
        plr.Coins.Value = plr.Coins.Value -1500
        local clone = game.Lighting.Magics.BubbleMagic:Clone()
        clone.Parent = backpack
        clone.Disabled = false
        script.Parent.Visible = false
    end
    if plr.Coins.Value <1500 then
        script.Parent.Text = "No Coins to buy this magic, "..name.Name.."."
        wait(2)
        script.Parent.Text = "Bubble Magic - 1500 Coins"
    end
end)

When I turned off FilteringEnabled, this always happen. Is FilteringEnabled or an error doing this??