Don't think i am doing it right, but to put it out somewhere.
No Idea what has happened, guess it was off-screen?

The mod Train Control Signals (1.0.6) caused a non-recoverable error.
Please report this error to the mod author.

Error while running event Train_Control_Signals::on_train_changed_state (ID 25)
Train_Control_Signals/script/train_control_signals.lua:40: attempt to index local 'station' (a nil value)
stack traceback:
Train_Control_Signals/script/train_control_signals.lua:40: in function 'station_is_disabled'
Train_Control_Signals/script/train_control_signals.lua:145: in function 'handler'
core/lualib/event_handler.lua:47: in function <core/lualib/event_handler.lua:45>

Do you maybe have a train that has no stations in its schedule or maybe you removed all of the stations while the train was moving?

I'm having the same issue, the crash occurs when riding a train in auto mode and it is arrived to a temporary stop and puting train in manual while the 5 seconds delay condition has not yet finished.

So my schedule is basically a temporary stop + a depot/refuel station.

• Little update, the crash only occurs while changing to manual during the inactivity countdown and if the station before where the train stopped on the schedule is a temporary one, and doesn't need to be a rider on the train.

I posted a fix in https://mods.factorio.com/mod/Train_Control_Signals/discussion/625cf86cfbaccc9f9f195713 maybe you want to test it