Got this while playing.

Error while running event
FuelTrainStop::on_train_changed_state{ID23}
FuelTrainStop/control.lua:305:attempt to index field 'station' {a nil value}

Game ver. 0.16.18
Active mods:
Auto deconstruct
Automatic Train Fuel Stop
Electric Furnaces
Foreman
Research Queue
Skandragon's Advanced Mining
Upgrade Builder and Planner
Warehousing Mod

Edit: Played from auto-save for about 15 minutes and has not repeated so far.

i am having the same problem only mine wont fix it's self it just keeps give that error code and crashing the game when i set the fuel stop down

should be fixed with the new update