The mod Max Rate Calculator (3.4.40) caused a non-recoverable error.
Please report this error to the mod author.
Error while running event MaxRateCalculator::on_player_selected_area (ID 49)
MaxRateCalculator/control.lua:1210: attempt to concatenate global 'entity_name' (a nil value)
stack traceback:
MaxRateCalculator/control.lua:1210: in function 'calc_inserter'
MaxRateCalculator/control.lua:1271: in function <MaxRateCalculator/control.lua:1219>
This is using the full suite of Angels and Bobs. I can provide a save if needed
