Whenever i place down this specific building and click on it, this mod crashes the game and i get the following message:

The mod Actual Craft Time caused a non-recoverable error.
Please report this error to the mod author.

Error while running event Actual_Craft_Time::on_gui_opened (ID 83)
Actual_Craft_Time/control.lua:348: attempt to perform arithmetic on field 'extra' (a nil value)
stack traceback:
Actual_Craft_Time/control.lua:348: in function 'addItemFrame'
Actual_Craft_Time/control.lua:614: in function <Actual_Craft_Time/control.lua:384>