?Roblox Error: attempt to index local 'ScreenGui' (a nil value)

Workspace.Part.Script:16: attempt to index local 'screengui' (a nil value)

wait(2) -- Testing to make sure assets loaded

script.Parent.Touched:connect(function(hit) if not hit or not hit.Parent then return end local human = hit.Parent:findFirstChild("Humanoid") if human and human:IsA("Humanoid") then local person = game.Players:GetPlayerFromCharacter(human.parent) if not person then return end person.Checklist.FirstEggCollected.Value = true local playgui = person:FindFirstChild('PlayerGui') print(playgui) wait(0.2) local screengui = playgui:FindFirstChild('ScreenGui') wait(0.2) print(screengui) -- This prints nil local collectnotice = screengui:FindFirstChild('CollectionNotice') -- This is line 16 local Toggle = collectnotice.Toggle local text = Toggle.Text local value = text.Value value = "The Easy Egg!" person:WaitForChild('PlayerGui'):FindFirstChild('ScreenGui'):FindFirstChild('CollectionNotice').Toggle.Color.Value = Color3.fromRGB(0,255,0) person:WaitForChild('PlayerGui'):FindFirstChild('ScreenGui'):FindFirstChild('CollectionNotice').Toggle.Value = true script.Parent:Destroy() wait(5) game.Workspace.Variables.IfFirstEggInGame.Value = false end end) I've been at this for hours. No idea how to make the error fix. FE is on, Yes its name is "ScreenGui" and it is inside "PlayerGui"

Error: Workspace.Part.Script:16: attempt to index local 'screengui' (a nil value)