Crash in alertCargoAcceptanceChange/MessageManager::post

[ZehMatt]

Version information:

• Platform: Windows 10
• Version: 24.04
• Build/commit: b1293bd

Describe the bug
The game is trying to access an object that is not loaded. I looked a bit into it and it seem that some cargo change happens with an invalid industry (null), not exactly sure what the actual root cause is, should we ignore such cargo changes on invalid industries or is the scenario corrupted in a way, either way the crash should be avoided somehow. I've tested a few versions and it crashes in pretty much all of them, I also tested the save in vanilla and it also crashes there so this is probably an original bug.

To Reproduce
Steps to reproduce the behaviour:

1. Load the attached save file.
2. Wait a few seconds.
3. Should crash now.

Austria 1900.zip