Is it possible to transfer table information with remote events?

I'm trying to transfer some information from a server script into a client script using remote events. And i'm transfering some table information from the server script into the client so hackers wouln't be able to access the code.

I can't seem to get it to work it just prints out an error in the outpot.

Here's my server script code:

local inv = {nil, nil, nil, nil, nil, nil, nil, nil, nil, nil}

local nextSlot = 1
local currentSlot = 1

function ToolHotbar(slot, empty, item)
	RemoteEvents.ToolHotbar:FireClient(slot, empty, item, inv[slot])
end

local function checkIfEmpty(empty, item)
	if inv[nextSlot] ~= nil then 
		nextSlot = nextSlot + 1
		currentSlot = currentSlot + 1
		if inv[nextSlot] ~= nil then
			nextSlot = nextSlot + 1
		end
		empty = true
		if nextSlot <= 10 then
			ToolHotbar(nextSlot, empty, item)
		else
			print("Your inventory is full please empty it.")
		end
	else
		print("Slot"..nextSlot.. " Is empty, Adding item...")
		empty = true
		ToolHotbar(nextSlot, empty, item)
	end
end

function addItem(empty, item)
	checkIfEmpty(empty, item)
end

addItem(nil, "Dirt")

Client script:

local rep = game.ReplicatedStorage
	local items = rep.items
	local Events = rep.Events;
	local RemoteEvents = Events.RemoteEvents;
	
local gui = script.Parent:WaitForChild("ScreenGui")
	local Toolbar = gui.Toolbar

local nextSlot = 1
local currentSlot = 1

RemoteEvents.ToolHotbar.OnClientEvent:connect(function(slot, empty, item, inv)
	
	if (type(inv) ~= "table") then
		inv = {inv}
	end	
	
	if empty then 
		local imageID = items[item]:FindFirstChild("imageID").Value
		Toolbar["Slot"..nextSlot].itemImage.Image = "rbxassetid://"..imageID
		Toolbar["Slot"..nextSlot].itemImage.Visible = true
		inv[nextSlot] = item
	end
end)

Error output:

20:49:29.370 - Unable to cast value to Object
20:49:29.371 - Stack Begin
20:49:29.371 - Script 'ServerScriptService.MainScript', Line 15 - global ToolHotbar
20:49:29.371 - Script 'ServerScriptService.MainScript', Line 35 - upvalue checkIfEmpty
20:49:29.372 - Script 'ServerScriptService.MainScript', Line 40 - global addItem
20:49:29.372 - Script 'ServerScriptService.MainScript', Line 43
20:49:29.373 - Stack End

Yes you can. Read "Parameters | Limitations | Remote Events and Functions" to see some examples and understand the limitations of passing tables to RemoteEvents and RemoteFunctions.