I traced the problem to the 'Skip first hour' mod from Aidan647, though other train mods also affected previous tutorials.
Replication steps:
- Install Skip first hour mod
- Create new game (default)
- Enter tutorial "Train schedules & train stops"
- Get to step where a burner inserter is to be used to fuel the train
- Note there is no coal available in inventory
Recommended fix: Automatically disable all mods in tutorials
Disabling mods in tutorials would also ensure the view of what people see, matches the screenshot in the tutorial pane. It may also make solving the tutorial crash bugs reported elsewhere mute.