The mod Will-o'-the-Wisps Unofficial Fork (0.3.32) caused a non-recoverable error.
Please report this error to the mod author.
Error while running event Will-o-the-Wisps-4::on_nth_tick(3607)
LuaEntity API call when LuaEntity was invalid.
stack traceback:
[C]: in function 'add_member'
Will-o-the-Wisps-4/control.lua:531: in function '?'
Will-o-the-Wisps-4/control.lua:744: in function 'run_periodic_task'
Will-o-the-Wisps-4/control.lua:779: in function <Will-o-the-Wisps-4/control.lua:760>
