There is this bug that has been discussed, if you loo for it.
When you reach the first evac on this mission, the game would crash on the scene of the evac.
I my case, it was this mod.
I removed this mod, and it didn't crash.

It's fair to say that apparently it's not only this mod that causes it, might even not be it, but certain combination or amount of mods, i dunno.
But it worked for me, to play without it until after this mission.
Since took me a lot of time to solve it, i think it can help some one.

I have no idea what could cause it.