Error while running event belt-balancer::on_nth_tick(8)
LuaTransportLine API call when LuaTransportLine was invalid.
stack traceback:
belt-balancer/objects/balancer.lua:198: in function 'run'
belt-balancer/helper/message-handler.lua:33: in function <belt-balancer/helper/message-handler.lua:31>
stack traceback:
[C]: in function 'len'
__belt-balancer/objects/balancer.lua:198: in function 'run'
belt-balancer/helper/message-handler.lua:33: in function <belt-balancer/helper/message-handler.lua:31>

Please provide the save or a way to reproduce this, so i can find out, what exactly got wrong!

I looked into the code at that point and the error unfortunately is not in that place, but happened in a different place, so i need to dig deeper into it, with your save :)