How do I get out of black reach 😭

I've been wandering around like an idiot for piss ages and it's irritating me. It says to use the elevator but I can't open it?? Where do I go to open it? I just want to leave and I can't find a straight answer anywhere 😭😭 Thank you in advance 🙏

I've been wandering around like an idiot for piss ages and it's irritating me. It says to use the elevator but I can't open it?? Where do I go to open it? I just want to leave and I can't find a straight answer anywhere 😭😭 Thank you in advance 🙏