Ошибка скрипт Lua( (Roblox Studio)

Ошибка: invalid argument #1 to 'find' (table expected, got nil)
Скрипт:
local ReplicatedStorage = game:GetService("ReplicatedStorage")
local towers = require(ReplicatedStorage:WaitForChild("TowerShop"))

local getDataFunction = ReplicatedStorage:WaitForChild("GetData")
local interactItemFunc = ReplicatedStorage:WaitForChild("InteractItem")


local gui = script.Parent
local exit = gui.Container.Exit
local noobCoins = gui.Container.NoobCoins
local limit = gui.Container.Limit
local itemsFrame = gui.Container.ItemsFrame

local playerData = {}

local function getItemStatus(itemName)
if table.find(playerData.SelectedTowers, itemName) then
return "Equipped"
elseif table.find(playerData.OwnedTowers, itemName) then
return "Owned"
else
return "For Sale"
end
end

local function interactItem(itemName)
local data = interactItemFunc:InvokeServer(itemName)
if data then
playerData = data
updateItems()
end
end

function updateItems()
noobCoins.Text = "$" .. playerData.NoobCoins
limit.Text = #playerData.SelectedTowers .. "/5"

for i, tower in pairs(towers) do

local oldButton = itemsFrame:FindFirstChild( tower.Name )
if oldButton then
oldButton: Destroy()
end

local newButton = itemsFrame.TemplateButton:Clone()
newButton.Name = tower.Name
newButton.TowerName.Text = tower.Name
newButton.Image = tower.ImageAsset
newButton.Visible = true
newButton.LayoutOrder = tower.Price
newButton.Parent = itemsFrame

local status = getItemStatus( tower.Name )
if status == "For Sale" then
newButton.Status.Text = "$" .. tower.Price
elseif status == "Equipped" then
newButton.Status.Text = "Equipped"
newButton.Status.TextColor3 = Color3.new (0.333333, 0.333333, 0.333333)
newButton.BackgroundColor3 = Color3.new (0.54902, 0.54902, 0.54902)
else
newButton.Status.Text = ""
end

newButton.Activated:Connect(function()
interactItem( tower.Name )
end)

end
end

local function toggleShop()
gui.Container.Visible = not gui.Container.Visible
if gui.Container.Visible then
playerData = getDataFunction:InvokeServer()
updateItems()
end
end

local function setupShop()
local prompt = Instance.new ("ProximityPrompt")
prompt.RequiresLineOfSight = false
prompt.ActionText = "Shop"
prompt.Parent = workspace:WaitForChild("ShopPart")
prompt.Triggered:Connect(toggleShop)
exit.Activated:Connect(toggleShop)
end

setupShop()