Error on deleting a scheduled train

[avax87]

Hi!

Describe the bug
When train is scheduled for delivery, LTNManager triggers a crash when you try to delete this train.

Save file
My game is heavily modded, if you'll be unable to reproduce it, i can try to reproduce it without other mods and provide a save.

To Reproduce
Steps to reproduce the behavior:

1. Start a new sandbox game
2. Create depot, provider and requester stations and configure it
3. Wait for train to be scheduled for delivery
4. Delete this train

P.S. it seems that this bug happens only with a new game.

Error log:

The mod LTN Manager [ALPHA] (0.1.4) caused a non-recoverable error.
Please report this error to the mod author.

Error while running event LtnManager::on_tick (ID 0)
__LtnManager__/gui/alert-popup.lua:73: attempt to index field 'settings' (a nil value)
stack traceback:
	__LtnManager__/gui/alert-popup.lua:73: in function 'create_for_all'
	__LtnManager__/scripts/data-manager.lua:452: in function 'handler'
	__RaiLuaLib__/lualib/event.lua:127: in function <__RaiLuaLib__/lualib/event.lua:28>

[jarquafelmu]

Provide a save anyways. It helps so that the author can see what is happening exactly

[raiguard]

Saves are nice, but if you can consistently reproduce it from new saves, it's probably not required. It would generally be a good idea to upload one anyway, just in case. I'll update the issue template with that information.

EDIT: In this case, it seems that the bug only happens with new saves, as per the info. So uploading the original file isn't needed.

[raiguard]

Turns out I forgot to sync player settings on first join. I never noticed this because every time I tested, I added the mod to an existing LTN demo world. Thank you for the report!