I am stuck here as well, and it is most certainly user error in my case. I am loving this game so much and really would like to finish. Hints would be mucho appreciated.
Oh that would be fantastic!
[spoilers for everyone else]
.
I was able to locate the document REMINDER.txt on John's machine, but a bit lost on how to open it/what to do with it.
Same! Hopefully someone can get us both unstuck T_T
If you enter ./John/Documents/other/REMINDER.txt it'll pop it open. It's a puzzle for the password.
I'm stuck a little after that though. Glad I'm not the only one struggling haha!