The mod Vehicle Wagon 2 (3.1.21) caused a non-recoverable error.
Please report this error to the mod author.

Error while running event VehicleWagon2::on_tick (ID 0)
Error when running interface function autodrive.vehicle_removed: autodrive/control.lua:324: attempt to index local 'owner' (a number value)
stack traceback:
autodrive/control.lua:324: in function 'reset_color'
autodrive/control.lua:819: in function 'gui_car_unpublish'
autodrive/control.lua:3255: in function <autodrive/control.lua:3244>
stack traceback:
[C]: in function 'call'
VehicleWagon2/script/loadVehicleWagon.lua:111: in function 'loadVehicleWagon'
VehicleWagon2/control.lua:141: in function <VehicleWagon2/control.lua:94>

Please report this to the AutoDrive mod author. They will also want a short explanation of what you did right before the crash so that they can replicate it.