My plugin script works but it inserts something when I join studio?

Here is the code I have

I made a plugin and for some reason the loader is inserting when I start studio when only the require script is suppost to when a button is pressed can you help?

-- Uploaded Message
print("REG Loader Plugin loaded")


-- Toolbar Setup
local toolbar = plugin:CreateToolbar("REG Plugins")

-- Variables
debounce = false
really = false

-- Button Setup
local button = toolbar:CreateButton(
    "Insert REG",
    "Inserts REG Lea into your game",
    "http://www.roblox.com/asset/?id=828747622"
)

if game.StarterGui:FindFirstChild("Loader") ~= nil then
    game.StarterGui.Loader:Destroy()
else
    really = true
end


button.Click:connect(function()
    if game.StarterGui:FindFirstChild("Loader") ~= nil then
        game.StarterGui.Loader:Destroy()
    else
        really = true
    end
    q = game.ServerScriptService:FindFirstChild("REG Lea | Loader")
    if q ~= nil then
        t = script.Parent.error:Clone()
        t.Parent = game.CoreGui
        debounce = true
        plugin:Activate(false)
        wait(4)
        t:Destroy()
    else
        plugin:Activate(true)
        local h = script.Parent.Lo:Clone()
        h.Name = "REG Lea | Loader"
        h.Parent = game.ServerScriptService
        b = script.Parent.success:Clone()
        b.Parent = game.CoreGui
        wait(4)
        plugin:Activate(false)
        b:Destroy()
    end
end)

It works but for some reason every time I try to enter studio it inserts the loader that is required within the script that is suppost to be inserted into ServerScriptService

Link to Plugin: https://www.roblox.com/library/852931945/REG-Loader-Insert

Please help!