Some time while I was playing, my save got corrupted in some way where it will crash the game for no reason. I alternated save slots and when I go back to my previous slots, even those crash, yet I was fine when I was playing through the story.
This is quite annoying. It's my second attempt at playing through the story. I used the Save Anywhere mod since it seems to work much better than the save pickups which may randomly teleport you to a random location or they'll corrupt the save to the point where you cannot load it.
Load the save with storyline mode installed and play for a few seconds and the game will crash.
If it somehow does not crash for you, save the game and send it to me. Perhaps I can pick up where I left off. lol