QuestGUI is not a valid member of PlayerGui how do i fix this!?

Look Line 126

local ReplicatedStorage = game:GetService("ReplicatedStorage")
local QuestLibraries = ReplicatedStorage:FindFirstChild("QuestLibraries")

-- Libraries --
local Dialogs = require(QuestLibraries:FindFirstChild("Dialogs"))
local Quests = require(QuestLibraries:FindFirstChild("Quests"))

-- Variables
local QuestGUI = ReplicatedStorage:FindFirstChild("QuestDialog", true)
local QuestTag = ReplicatedStorage:FindFirstChild("QuestTag", true)
local Quest = script.Configurations.Quest.Value
local Enabled = script.Configurations.QuestEnabled.Value


-- create quest folder function --
function StartQuest(QuestID, Quest_Data)
	local folder = Instance.new("Folder")
	folder.Name  = QuestID
	
	local number = Instance.new("IntValue")
	number.Name  = "Number"
	number.Parent = folder
	
	local goal  = Instance.new("IntValue")
	goal.Name   = "Goal"
	goal.Value  = Quest_Data["Nmbr"]
	goal.Parent = folder
	
	return folder
end

---- Create Quest Tag Function ----
function CreateTag(QuestID, Quest_Data)
	
	local Tag  = QuestTag:Clone()
	Tag.Name   = QuestID
	Tag.Status.Text = "0 / " .. Quest_Data["Nmbr"]
	Tag.Title.Text  = "  " .. Quest_Data["Name"]
	
	return Tag
	
	
end


script.Parent.Torso.Touched:connect(function(part)
	
	if part.Parent:FindFirstChild("Humanoid") ~= nil then
		
		
		local Player = game.Players:FindFirstChild(part.Parent.Name)
		local PlayerGui = Player:FindFirstChild("PlayerGui")
		
		if PlayerGui:FindFirstChild("QuestDialog") == nil then
			
			---- GUI Parts ----
			local GUI         = QuestGUI:Clone()
		    local Main        = GUI.Hold.Hold.Frame
		    local GUI_Name    = Main:FindFirstChild("Name", true)
		    local Decline_Btn = Main:FindFirstChild("Decline",true)
		    local Accept_Btn  = Main:FindFirstChild("Accept",true)
		    local NPC_Dialog  = Main:FindFirstChild("NPCDialog",true)
		
		    ---- Quest/Dialog Tables ----
		    local Dialog_Data = Dialogs.dialog[Quest]  
		    local Quest_Data = Quests.quests[Quest]
		
		    ---- Set Defaults ---- 
		    GUI_Name.Text    = " " .. script.Parent.Name
		    Decline_Btn.Text = Dialog_Data["NoQuest"]["EXIT"]
		
		    GUI.Parent = PlayerGui -- Put Gui into PlayerGui
			
			---- Get number of dialogs ----
			local num_of_dialogs = 0
			
			for key, value in pairs(Dialog_Data["NoQuest"]) do
				if key ~= "EXIT" then
					num_of_dialogs = num_of_dialogs + 0.5
				end
			end
			
			---- go through dialog ----
			local OnQuest      = false
			local IsComplete   = false
			local dialog_num   = 1
			local Quest_Folder = nil
			
			if Player:FindFirstChild(Quest) ~= nil then
				Quest_Folder = Player:FindFirstChild(Quest)
				
				OnQuest = true
				
				if Quest_Folder.Number.Value >= Quest_Data["Nmbr"] then
					IsComplete = true
				end
			end
			
			if OnQuest then
				Accept_Btn.Visible = false
					
			    if IsComplete then
					NPC_Dialog.Text    = " " .. Dialog_Data["Quest"]["COMPLETE"]
					Decline_Btn.Text   = "Thanks!"
					
					---- Finish Quest: Get Rewards, Remove Quest Folder ----
					Decline_Btn.MouseButton1Click:connect(function()
						local leaderstats      = Player:FindFirstChild("leaderstats")
						leaderstats.Beli.Value = leaderstats.Beli.Value + Quest_Data["Beli"]
						leaderstats.XP.Value = leaderstats.XP.Value + Quest_Data["XP"]
						
						Quest_Folder:Destroy()
					end)
				else
					NPC_Dialog.Text    = " " .. Dialog_Data["Quest"]["INCOMPLETE"]
					Decline_Btn.Text   = "Oh, right...."
			    end
			else
				Accept_Btn.MouseButton1Click:connect(function()
				   if dialog_num ~= num_of_dialogs then
				       dialog_num = dialog_num + 1
					
					   NPC_Dialog.Text = " " .. Dialog_Data["NoQuest"]["NPC" .. dialog_num]
		               Accept_Btn.Text = Dialog_Data["NoQuest"]["RES" .. dialog_num]
				   else
					   local GUIContainer = Player.PlayerGui.QuestsGUI:FindFirstChild("Container")
					
					   local Quest_Folder  = StartQuest(Quest, Quest_Data)
					   Quest_Folder.Parent = Player
					
					   local Quest_Tag  = CreateTag(Quest, Quest_Data)
					   Quest_Tag.Parent = GUIContainer
					
					
				       GUI:Destroy()
				    end
			    end)
			end
			
		end
		
	end
	
end)