[SOLVED BY SELF] ScreenGui is not a valid member of PlayerGui? Not working?

I keep getting the "expGui is not a valid member of PlayerGui" error It is a local script in starterplayerscripts

here is my script

--References
local gButton = game.Workspace.MissionWall.GreenButton.ClickDetector
local rButton = game.Workspace.MissionWall.RedButton.ClickDetector
local valueRef = game.Workspace.Values
--Values
local missionStatus = valueRef.MissionStatus
local expAmount = valueRef.ExpLevel
local expToNextLevel = valueRef.ExpToNextLevel
--Numbers
local numberOfTimesPressed = 0
local numberOfTimesToBePressed = 5
local expReward = 100
--Mission Script
gButton.MouseClick:Connect(function()
	missionStatus = true
	game.Players.LocalPlayer.PlayerGui.activeMission.missionLabel.Text = 'Press the red button '..numberOfTimesToBePressed..' more times.'
	print('pressed')
end)

rButton.MouseClick:Connect(function()
	if missionStatus == true then
		if numberOfTimesPressed < numberOfTimesToBePressed then
			numberOfTimesPressed = numberOfTimesPressed + 1
			game.Players.LocalPlayer.PlayerGui.activeMission.missionLabel.Text = 'Press the red button '..numberOfTimesToBePressed - numberOfTimesPressed..' more times.'
			print('pressed')
		end
		if numberOfTimesPressed == 5 then
		missionStatus = false
		numberOfTimesPressed = 0
		numberOfTimesToBePressed = 5
		expAmount.Value = expAmount.Value + expReward
		print('finished')
		game.Players.LocalPlayer.PlayerGui.activeMission.missionLabel.Text = 'Mission finished'
		wait(5)
		game.Players.LocalPlayer.PlayerGui.activeMission.missionLabel.Text = 'You have no active missions.'
		end
	end
end)
--Gui Update Script
while true do
	if expAmount.Value == expToNextLevel.Value then
		expAmount.Value = 0
		expToNextLevel.Value = expToNextLevel.Value * 2
	elseif expAmount.Value > expToNextLevel.Value then
		expAmount.Value = expAmount.Value - expToNextLevel.Value
		expToNextLevel.Value = expToNextLevel.Value * 2
	end
	game.Players.LocalPlayer.PlayerGui.expGui.Bar.Size = UDim2.new((expAmount.Value / expToNextLevel.Value) * 0.314, 0, 0.114, 0)
	game.Players.LocalPlayer.PlayerGui.expGui.TextLabel.Text = expAmount.Value..'/'..expToNextLevel.Value
	wait(1)
end

I moved it to StarterCharacterScripts and that fixed it.