Błąd misji powoduje wyłączenie gry

Another great mission, I'm a fan of his mission, I tried to play missions in SP mode, but this is not possible. I understand that this is a mission coop, but I have a request:
You can redo the mission so that it can be played with a choice of sp team member as the previous mission, and add the option to save and load the state of the mission in SP mode, as on previous missions. I would add dating Nightstalker. I'll be grateful for the change and look forward to more missions, who will play in the SP mode.