I am devastated. Enjoy very much to play the game, but in one specific level in the Syria campaign, it now crashes all the time. As it is one of the ambush leveles, and on the only route, I cannot simply avoid it. It is one of the zombie bunker levels. Any any idea, what I can do?

Restarted the game.
restarted the pc.
Level loads, but in the middle of battle, sometimes in my moves, sometimes in the enemy moves, it freezes, and crashes.

I don't know what does it mean because I don't have the game but after this topic, "Disable Reverb in Pathway's audio options" may help.
You could try find another solution on the game specific forum