attempt to index nil with 'Parent'?

So I have this script that puts a Gui into a player when touching a part and when I went to go test it today I got "attempt to index nil with 'Parent'" I literally changed nothing in the script and it was just working :/

local market = game:GetService("MarketplaceService")
	local part = script.Parent
	local GUI = game.ReplicatedStorage.GunShop
	 
	local function onTouched(hit)
		local newboii = GUI:Clone()
	    local humanoid = hit.Parent:WaitForChild("Humanoid")	 
	  if humanoid then
	        local char = hit.Parent
	        local sPlayer = game.Players:GetPlayerFromCharacter(char)
	        local putinto = sPlayer:WaitForChild("PlayerGui")
		if market:UserOwnsGamePassAsync(sPlayer.UserId,8810446) then
			newboii.Parent = putinto -- this is the line it errors at 
	    else
		market:PromptGamePassPurchase(sPlayer,8810446)
	end
	    end
	end
	 
	part.Touched:Connect(onTouched)

This might work

local market = game:GetService("MarketplaceService")
    local part = script.Parent
    local GUI = game.ReplicatedStorage.GunShop

    local function onTouched(hit)
        local humanoid = hit.Parent:WaitForChild("Humanoid")     
      if humanoid then
            local char = hit.Parent
            local sPlayer = game.Players:GetPlayerFromCharacter(char)
            local putinto = sPlayer:WaitForChild("PlayerGui")
        if market:UserOwnsGamePassAsync(sPlayer.UserId,8810446) then
        	GUI:Clone().Parent = putinto--put the clone gui here and made it clone into "putinto"
        else
        market:PromptGamePassPurchase(sPlayer,8810446)
    end
        end
    end

    part.Touched:Connect(onTouched)

If this doesn't work let me know and I can try and find another solution