Bom dia, alguem pode me ajudar com esse error, ou poderia converter esse script para tfs 1.3

Lua Script Error: [Action Interface]
data/actions/scripts/cave_exc/cave_1.lua:onUse
luaAddEvent(). Argument #3 is unsafe
stack traceback:
        [C]: in function 'addEvent'
        data/actions/scripts/cave_exc/cave_1.lua:126: in function <data/actions/scripts/cave_exc/cave_1.lua:83>

Lua Script Error: [Action Interface]
data/actions/scripts/cave_exc/cave_1.lua:onUse
data/actions/scripts/cave_exc/cave_1.lua:131: attempt to concatenate a nil value
stack traceback:
        [C]: in function '__concat'
        data/actions/scripts/cave_exc/cave_1.lua:131: in function <data/actions/scripts/cave_exc/cave_1.lua:83>