RevScripts Craft table

[Belfahar]

Hi everyone, it's me again! I appreciate all the support and help you have given, I am learning little by little. Today i trying to create an item crafting system, the player clicks on the statue and opens the modal window for interaction, but the script is not working.

local forgeExal = Action()

function capAll(str)
    return str:gsub("^(%a)", string.upper):gsub("([^%a]%a)", string.upper)
end

local config = {
    mainTitleMsg = "Thazoran Forge",
    mainMsg = "Welcome to the Thazoran.\nPlease choose a category:",
 
    craftTitle = "Thazoran Forge: ",
    craftMsg = "Click on Recipe to see the necessary resources needed to craft a new item.\n\nHere is a list of all resources that can be crafted: ",
    needItems = "You do not have all the required items to craft.",
    system = {
        [1] = {tiers = "Set level 50",
            items = {
                [1] = {item = "Crusader Helmet",
                        itemID = 3391,
                        reqItems = {
                                [1] = {item = 22722, count = 4}, -- 4 copper token
                                [2] = {item = 10275, count = 50}, -- 50 carrion worm fang
                            },
                        },
 
                [2] = {item = "Crown Armor",
                        itemID = 3381,     
                        reqItems = {
                                [1] = {item = 22722, count = 4}, -- 4 copper token
                                [2] = {item = 11453, count = 50}, -- 50 orc broken helmet
                            },
                        },                 
 
                [3] = {item = "Crown Legs",
                        itemID = 3382,         
                        reqItems = {
                                [1] = {item = 22722, count = 4}, -- 4 copper token
                                [2] = {item = 11482, count = 50}, -- 50 piece of warrior armor
                        },
                    },
 
                [4] = {item = "Fur Boots",
                        itemID = 7457,             
                        reqItems = {
                                [1] = {item = 22722, count = 4}, -- 4 copper token
                                [2] = {item = 9657, count = 50}, -- 50 cyc toe
                        },
                    },
                },
            },
        [2] = {tiers = "Set level 100",
            items = {
                [1] = {item = "Royal Helmet",
                        itemID = 3392,
                        reqItems = {
                                [1] = {item = 22722, count = 4}, -- 4 copper token
                                [2] = {item = 10275, count = 50}, -- 50 carrion worm fang
                            },
                        },
 
                [2] = {item = "Dragon Scale Armor",
                        itemID = 3386,     
                        reqItems = {
                                [1] = {item = 22722, count = 4}, -- 4 copper token
                                [2] = {item = 11453, count = 50}, -- 50 orc broken helmet
                            },
                        },                 
 
                [3] = {item = "Zaoan Legs",
                        itemID = 10387,         
                        reqItems = {
                                [1] = {item = 22722, count = 4}, -- 4 copper token
                                [2] = {item = 11482, count = 50}, -- 50 piece of warrior armor
                        },
                    },
 
                [4] = {item = "Soft Boots",
                        itemID = 6529,             
                        reqItems = {
                                [1] = {item = 22722, count = 4}, -- 4 copper token
                                [2] = {item = 9657, count = 50}, -- 50 cyc toe
                        },
                    },
                },
            },
        },
        }
      
function forgeExal.onUse(player, item, fromPosition, itemEx, toPosition, isHotkey)
    if player:getStorageValue(490201) == 1 then
        player:sendMainCraftWindow(config)
        else
            player:sendTextMessage(MESSAGE_EVENT_ADVANCE, "You didn't learn how to craft items. You need the dwarf craft rune.")
        return true
        end
end
forgeExal:aid(23401)
forgeExal:register()

Error:

[2023-23-11 16:33:30.102] [error] Lua script error:
scriptInterface: [Scripts Interface]
scriptId: [C:\Canary-Dungeon\data-otservbr-global/scripts\actions\custom_dungeon\craft_rare_eq.lua:callback]
timerEvent: []
 callbackId:[]
function: []
error [...-global/scripts\actions\custom_dungeon\craft_rare_eq.lua:91: attempt to index global 'modalWindow' (a nil value)
stack traceback:
        [C]: in function '__index'
        ...-global/scripts\actions\custom_dungeon\craft_rare_eq.lua:91: in function <...-global/scripts\actions\custom_dungeon\craft_rare_eq.lua:89>]

EDIT:

I add data/events/scripts/craft_system.lua and dofile('data/events/scripts/craft_system.lua') on global.lua
And now modal window open, but dont change the options.