Die Mod Belt Balancer (2.1.3) hat einen Fehler verursacht, der nicht behoben werden kann.
Bitte informiere den Autor der Mod über diesen Fehler.

Error while running event belt-balancer::on_built_entity (ID 6)
belt-balancer/objects/balancer.lua:140: attempt to index local 'stack_belt' (a nil value)
stack traceback:
belt-balancer/objects/balancer.lua:140: in function 'recalculate_nth_tick'
belt-balancer/objects/belt.lua:239: in function 'built_belt'
belt-balancer/control.lua:130: in function <belt-balancer/control.lua:114>

I dit place and remove and place again some belts.
Could not reproduce but maybe the code line coude be more safe checking for nil?