Need help with this Inventory Script. Help?

I recently found a new inventory script from my last one but it says it has errors in the output. i cant figure out the problems with the script can someone please help!?

Heres The Script

local player = Game.Players.LocalPlayer

function onClicked()
	local iframe = script.Parent.Parent.InventoryFrame 
	local controls = script.Parent.Parent.Controls
	local options = script.Parent.Parent.Options
	local statistics = script.Parent.Parent.Statistics
	if not player.Character.Humanoid.Sit then
		if not iframe.Visible then
			player.Backpack.GlobalFunctions.invopen.Value = 1
			iframe.Visible = true
			controls.Visible = false
			options.Visible = false
			statistics.Visible = false
			script.Parent.Text = "Close Inventory"
			script.Parent.Modal = true
			player.Character.Humanoid.WalkSpeed = 0
		else
			player.Backpack.GlobalFunctions.invopen.Value = 0
			iframe.Visible = false
			script.Parent.Modal = false
			script.Parent.Text = "Open Inventory"
			player.Character.Humanoid.WalkSpeed = 16
		end
	end 
end

script.Parent.MouseButton1Click:connect(onClicked)