Just blocked the hacking in Augusta Tower 300AF. Now I need key 13 from the past. Every guide simply says to go to Augusta Tower 200F, ignoring the crucial part where I actually unlock this area. I cannot do anything anymore in the room where I stopped the hacking either.
Also, I accidentally left that void early cause the gate back looked and was described like the puzzles earlier and with part of the map blocked by it it seemed like this was another puzzle I had to do. But I just got back to the Historia Crux and now I cannot return. I only got this weird node in the Historia Crux I cannot access. Did I miss anything? The guides make it look like I actually managed to lock myself out of continuing the game altogether or at lest out of unlocking a whole bunch of optional areas.
Sidequest? The game told me to get key 13 when I wanted to continue the main plot in 300AF. I also heard I should have unlocked places like Sunleth, Academia and Serendipity already. I don't have any of those.