u/Apprehensive_Tea1022

I’m currently playing Alien: Isolation for the first time and just talked to Apollo. My objective says that I have to exit Apollo beneath the core. There is a ladder (the one in the pictures) but it won’t go up for me to use it.
I’ve loaded and restarted the game multiple times but it’s always the same. And there is also nothing I can do in that room. There are 2 vents but both are locked.
I would really appreciate it if anyone could help me with this.