I get the error from the title in my Roblox(Lua) code. Here’s the code:
local inventoryEvent = game.ReplicatedStorage.Remotes.InventoryEvent

game.Players.PlayerAdded:Connect(function(player)
— Ensure the player’s inventory exists
local inventory = player:FindFirstChild(“Inventory”)
if not inventory then
inventory = Instance.new(“Folder”)
inventory.Name = “Inventory”
inventory.Parent = player
end

-- Ensure InventoryGui and its components exist
local inventoryGui = player.PlayerGui:WaitForChild("InventoryGui")
local inventoryFrame = inventoryGui:WaitForChild("InventoryFrame")
local itemsFrame = inventoryFrame:WaitForChild("ItemsFrame")

-- Connect inventory child added event
inventory.ChildAdded:Connect(function(Item)
    print("Item added to inventory: " .. Item.Name)  -- Debugging statement
    inventoryEvent:FireClient(player, Item.Name, true)  -- Pass the item's name as a string and true as Value
end)

end)

inventoryEvent.OnServerEvent:Connect(function(player, ItemName, Value, button)
— Validate arguments
if not (player and ItemName and Value and button) then
warn(“Missing argument in inventoryEvent.OnServerEvent”)
return
end

-- Debugging output
print("Received request to process item:", ItemName)

if Value == false then
    local selectedItem = player.Inventory:FindFirstChild(ItemName)
    if not selectedItem then
        print("Items in inventory:")
        for _, item in ipairs(player.Inventory:GetChildren()) do
            print(item.Name)
        end
        warn("Selected item not found in inventory: " .. ItemName)
        return
    end

    local backpack = player.Backpack:GetChildren()
    local characterItems = player.Character:GetChildren()

    if #backpack == 0 and not player.Character:FindFirstChildWhichIsA("Tool") then
        button.Text = "Unequip"
        button.BackgroundColor3 = Color3.new(1, 0, 0)
        selectedItem:Clone().Parent = player.Backpack
    else
        for _, v in ipairs(backpack) do
            button.Text = "Equip"
            button.BackgroundColor3 = Color3.new(0, 1, 0)
            v:Destroy()
        end
        for _, v in ipairs(characterItems) do
            if v:IsA("Tool") then
                button.Text = "Equip"
                button.BackgroundColor3 = Color3.new(0, 1, 0)
                v:Destroy()
            end
        end
    end
end

end)
And the real error: Missing argument in inventoryEvent.OnServerEvent – Server – InventoryScript:27
Can anyone help?

I tried asking chat gpt, copilot and every possible lua guide to fix it!