I Got the same error on the first flight mission, but it is 307-400-00002.
It is not fixed.
EDIT!!! I got it fixed. I already posted a solution to Mission CTDs in general. As this was actually not a CTD I thought it is something different, but it all comes down to settings, which are far from optimized in MSFS2024.
Solution: Lower your settings, start with lowest settings if your PC is not high end.
For example I can run at ultra but for this mission I turned off all traffic, road, fauna, Raytraced shadows and online weather (although weather should actually not come to play. Read this article for more details. This btw fixes Tornado as well and any other mission CTD/error I have encountered.
Happy flying