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

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)