Make sure that both Connor and Markus are still alive at this point in the story. During ‘Crossroads’ Connor should have figured out Jericho’s location and confronted Markus in the cabin.
Choose the following options during their interaction: DISCOURAGE > INSTRUCTIONS > I KNOW YOU > CONVINCE > SAY NOTHING > SOW DOUBTS > QUESTION > BECOME DEVIANT
Note: It’s important to increase Connor’s software instability before and during this chapter. To help Connor become deviant, you can choose to not shoot Chloe during ‘Meet Kamski’, and always put the safety of others before your objective. To do this, avoid killing deviants, show emotion, and build your friendship status with Hank.