The mod Spawner alert (0.1.7) caused a non-recoverable error.
Please report this error to the mod author.
Error while running event spawner-alert::on_nth_tick(60)
'precision_index': real number expected got nil.
stack traceback:
[C]: in function 'get_flow_count' spawner-alert/control.lua:62: in function <spawner-alert/control.lua:53>