Update:
I replayed it again. If you pick up Elisabeth from the airport and then do the DLC. The player gets can't progress where Mrs. Evan picks up the tomato. The player gets stuck on that screen. The music keeps looping and you can't continue thru the DLC. You can still play the main game.
This must be a caching issue if you pick up Elisabeth from the airport. You need to go back to Unity and check that path. Something is blocking this DLC.