[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