Error while running event IndustrialDisplays::on_robot_mined_entity (ID 64)
__IndustrialDisplays__/control.lua:241: bad argument #3 of 3 to '__index' (string expected, got nil)
stack traceback:
[C]: in function '__index'
__IndustrialDisplays__/control.lua:241: in function <__IndustrialDisplays__/control.lua:236>