Add trains to your blueprints.
Mods introducing new content into the game.
Change blueprint behavior.
Error while running on_configuration_changed: blueprint-train/control.lua:942: attempt to index field 'blueprint-train' (a nil value)
This happens only with one save file. (With a lot of mods but others saves with mods load correctly.
Thanks for the report, fixed in version 0.16.10
