If your task is to open the safe, you have to do that next; you are not supposed to be able to go to sleep (unless the dev changes that). Opening the safe is the end of this chapter and version of the game. In case you've tried but haven't been able to, here is the process you
should be able to follow to open the safe, if you've done everything from previous versions of the game:
And, just in case, here is a saved game where the safe has been opened; this means, though, that you're at the end of Chapter 2; there is nothing more in the storyline in this version of the game. (Don't forget to rename the save file to a page convenient for you. If your last save spot was Page 17 and spot 5, you might want to rename the file to
17-6-LT1.save for example.)