Arument missing on FindFirstChild???

alright so i am new to using tables and on my script i got everything correct (or so i thought) and i can print out a value in my table no problem on any line but if i use that in a :FindFirstChild() even if i wrap it in tostring() it says that somehow argument 1 is missing or nil however that works

Script:

local Module = require(game.ServerScriptService.Interaction.LootTable)
local UiModule = require(game.ReplicatedStorage.LocalModules.CreateLootUI)
local LootAmount = math.random(1,7)
local Gui = script.Parent.LootBag
local MainFrame = Gui:WaitForChild("MainFrame")
local Storeloot = {}
print(LootAmount)
for count = 1, LootAmount do
	local Item = MainFrame:WaitForChild("Item"..count)
	Item.Visible = true
	Item:WaitForChild("ItemName").Text = Module.ReturnLoot()
	print(Item.ItemName.Text)
	Storeloot[count] = Item.ItemName.Text
	wait(.1)
end

for index = 1, #Storeloot do
	print(index, Storeloot[index])
end

local Humanoid = script.Parent.Humanoid
local Event = Instance.new("RemoteEvent")
Event.Parent = script.Parent
Event.Name = "TakeLoot"
Event.OnServerEvent:Connect(function(Player,ArrayNumber)
	if Humanoid.Health <= 0 then
		local mag = (script.Parent.UpperTorso.Position - Player.Character.HumanoidRootPart.Position).magnitude
		if mag <= 7 then
			print(ArrayNumber,Storeloot[ArrayNumber])
			if game.ServerStorage.LootItems:FindFirstChild(Storeloot[ArrayNumber]) then
				if Storeloot[ArrayNumber]:Find(Storeloot[ArrayNumber],"Token") then
					Player.CurrencyHolder.Tokens.Value = Player.CurrencyHolder.Tokens.Value + string.sub(Storeloot[ArrayNumber],7,#Storeloot[ArrayNumber])
				else
					game.ServerStorage:FindFirstChild(Storeloot[ArrayNumber]).Parent = Player.PlayerGui
				end
			end
		end
	end
end)