"PreviewThumb is not a valid member of Tool"... But I can see it in explorer?

So, I have an inventory set up with a couple of test items. There are options to drop, equip, and display lore. All work fine, except for one. When I drop an item, clicking on the item no longer triggers anything because for some reason, it thinks there is no imagelabel in the tool.

The function works by getting a list of tools in a folder and making a new imagebutton for each of the tools. I have in each tool an ImageLabel named "PreviewThumb". When I activate the drop, it seems to no longer think that I have one there, when I can clearly see it in studio. I even made a thing that did a FindFirstChild("PreviewThumb") and only ran the code if FIndFirstChild == true. It was equal to true, yet in the very next line of code, it had an error saying there was no previewThumb! Infuriating! Here are my variables.

local InvGUI = script.Parent.InvMenu.Main
local InvList = InvGUI.List
local BackPack = script.Parent.Backpack
local getItems = BackPack:GetChildren()
local TableIns = table.insert
local TableRem = table.remove
local loot = game.ServerStorage.Loot
local character = script.Parent.Parent.Character
local Player = script.Parent.Parent
local CarryWeight = InvGUI.Parent.CarryWeight
local CarryWeightDisplay = InvGUI.Info.CarryWeight
local GuiStorage = game.ServerStorage.GuiStore
local ItemsTable = {}
local Listing = false
local DestroyThese = {}

I am very sorry for the messy code. For clarification, MakeList() fires on the player pressing E, along with a separate function that enables the GUI. The line at which the script stops and gives the "PreviewThumb is not a valid member of Tool" error is 19 below. Any help at all would be greatly appreciated.

function MakeList(label)
print("Makelist Fired!")

for i = 1,#getItems do

    print(getItems[i]:GetFullName())
    print("Forloop fired", i, "times!")

    print("Create button fired!")


    CarryWeightDisplay.Text = CarryWeight.Value

local button = Instance.new("ImageButton")
local listcon = Instance.new("UIListLayout")
button.Parent = InvList


        button.Image = getItems[i].PreviewThumb.Image
        button.Name = getItems[i].Name
        listcon.Parent = button
        button.MouseButton1Down:connect(function(label)

        if Listing == false then

        Listing = true

        local Equip = GuiStorage.ItemTemplate:Clone()
        Equip.Name = "Equip"
    Equip.Parent = button
    Equip.Text = "Equip"

    Equip.MouseButton1Click:connect(function(Clicked)

    local BClone = BackPack[button.Name]:Clone()    
    character.Humanoid:EquipTool(BClone)

    local PlayerPack = Player.Backpack:GetChildren()

    for i = 1,#PlayerPack do
        if PlayerPack[i].ClassName == "Tool" then
            PlayerPack[i]:Destroy()
        end
end

    end)


    local Drop = GuiStorage.ItemTemplate:Clone()

    Drop.Name = "Drop"
    Drop.Parent = button
    Drop.Text = "Drop"
    Drop.MouseButton1Click:connect(function(DropClicked)

        CarryWeight.Value = CarryWeight.Value - BackPack     [button.Name].ItemWeight.Value 
        local BCDrop = loot[button.Name]
        local CloneDrop = BCDrop:Clone()
        TableIns(DestroyThese, button.Name)
        CloneDrop.Parent = workspace
        CloneDrop:MoveTo(character.HumanoidRootPart.Position)
        button:Destroy()
    end)

    local Lore = GuiStorage.ItemTemplate:Clone()
    Lore.Name = "Lore"
    Lore.Parent = button
    Lore.Text = "Lore"

    Lore.MouseButton1Click:connect(function(LoreClicked)

        InvGUI.Info.LoreBox.Text = BackPack[button.Name].Lore.Value

                     end)
                end
            end)

    button.MouseLeave:connect(function(label)



        local GetList = button:GetChildren()

        for i = 1,#GetList do

            if GetList[i].ClassName == "TextButton" then

                GetList[i]:Destroy()

                Listing = false

            end


        end


    end)


        end
    end