Hello there, I have a friend with exactly the same issue, he has just losty the chance to get any reward in the mission "The enemy Within" and that's not even the first time it happens.
He sent a message to the game support a week ago, still haven't recieved a reply.
We need some help with this issue, theres too much people with this kind of crashes that feel pretty ignored.
Hope some devs can answer this someday