"He's random — sometimes when I click on the kitchen, a sort of code interface pops up. Other times, when I click on the sofa where I sleep, it also appears. But in the game, only the sofa can be used to skip the night, so I can only click on a button called 'ignore' on the code interface."
The reason for the game crashes may be problems with saves from 2 different versions of the game. If you loaded a save from an older version of the game, this may cause crashes when you press some buttons. To avoid this problem, you can start the game from the beginning and then the saves from one version of the game will work fine.