Lua Help autoloot talkaction

[dervin13]

Hello, someone can help me to solve this problem?
Lua Script Error: [TalkAction Interface]
autoloot.lua:6: attempt to index field '?' (a nil value)
autoloot.lua:39: attempt to index field '?' (a nil value)

thanks

function onSay(player, words, param)
    local split = param:split(",")

    local action = split[1]
    if action == "add" then
        local item = split[2]:gsub("%s+", "", 1)
        local itemType = ItemType(item)
        if itemType:getId() == 0 then
            itemType = ItemType(tonumber(item))
            if itemType:getId() == 0 then
                player:sendTextMessage(MESSAGE_STATUS_CONSOLE_BLUE, "There is no item with that id or name.")
                return false
            end
        end

        local itemName = tonumber(split[2]) and itemType:getName() or item
        local size = 0
        for i = AUTOLOOT_STORAGE_START, AUTOLOOT_STORAGE_END do
            local storage = player:getStorageValue(i)
            if size == AUTO_LOOT_MAX_ITEMS then
                player:sendTextMessage(MESSAGE_STATUS_CONSOLE_BLUE, "The list is full, please remove from the list to make some room.")
                break
            end

            if storage == itemType:getId() then
                player:sendTextMessage(MESSAGE_STATUS_CONSOLE_BLUE, itemName .." is already in the list.")
                break
            end

            if storage <= 0 then
                player:setStorageValue(i, itemType:getId())
                player:sendTextMessage(MESSAGE_STATUS_CONSOLE_BLUE, itemName .." has been added to the list.")
                break
            end

            size = size + 1
        end
    elseif action == "remove" then
        local item = split[2]:gsub("%s+", "", 1)
        local itemType = ItemType(item)
        if itemType:getId() == 0 then
            itemType = ItemType(tonumber(item))
            if itemType:getId() == 0 then
                player:sendTextMessage(MESSAGE_STATUS_CONSOLE_BLUE, "There is no item with that id or name.")
                return false
            end
        end

        local itemName = tonumber(split[2]) and itemType:getName() or item
        for i = AUTOLOOT_STORAGE_START, AUTOLOOT_STORAGE_END do
            if player:getStorageValue(i) == itemType:getId() then
                player:sendTextMessage(MESSAGE_STATUS_CONSOLE_BLUE, itemName .." has been removed from the list.")
                player:setStorageValue(i, 0)
                return false
            end
        end

        player:sendTextMessage(MESSAGE_STATUS_CONSOLE_BLUE, itemName .." was not founded in the list.")
    elseif action == "show" then
        local text = "-- Auto Loot List --\n"
        local count = 1
        for i = AUTOLOOT_STORAGE_START, AUTOLOOT_STORAGE_END do
            local storage = player:getStorageValue(i)
            if storage > 0 then
                text = string.format("%s%d. %s\n", text, count, ItemType(storage):getName())
                count = count + 1
            end
        end

        if text == "" then
            text = "Empty"
        end
  
        player:showTextDialog(1950, text, false)
    elseif action == "clear" then
        for i = AUTOLOOT_STORAGE_START, AUTOLOOT_STORAGE_END do
            player:setStorageValue(i, 0)
        end

        player:sendTextMessage(MESSAGE_STATUS_CONSOLE_BLUE, "The autoloot list has been cleared.")
    else
        player:sendTextMessage(MESSAGE_STATUS_CONSOLE_BLUE, "Use the commands: !autoloot {add, remove, show, clear}")
    end

    return false
end