When trying to control a train Ammo loader makes an error like this:
Error while running event ammo-loader::on_tick (ID 0)
ammo-loader/lib/TrackedSlot.lua:974: attempt to index field 'player' (a nil value)
stack traceback:
ammo-loader/lib/TrackedSlot.lua:974: in function 'doProvide'
ammo-loader/lib/Force.lua:436: in function 'tickProvidedSlots'
ammo-loader/lib/Force.lua:207: in function 'tick'
ammo-loader/lib/Force.lua:193: in function 'tickAll'
ammo-loader/lib/Handlers.lua:175: in function 'func'
ammo-loader/lib/Handlers.lua:52: in function <ammo-loader/lib/Handlers.lua:39>
