Почему крашится скрипт?

[Yans]

[17:06:26.165253] (error) renderobjects.lua: moonloader\renderobjects.lua:52: attempt to index global 'checkbox123' (a nil value)
stack traceback:
moonloader\renderobjects.lua: in function <moonloader\renderobjects.lua:29>
[17:06:26.165253] (error) renderobjects.lua: Script died due to an error. (17396B2C)