I come straight to the point, I've been playing Advanced Rocketry for a while now and also have a large space station (about 400 blocks long) and it should have an oxygen supply, but no matter what I do with Oxygen Vents and Co2 Scrubbern, it does not help. I did it exactly like on Youtube and unfortunately did not find anything that helped. That's why I need help. I would be very grateful! (The space station is also completely closed, but the Co2 scrubbers keep going off and there's no oxygen pumping.)
Try to turn on the power
I know, there are stupid answers but wow, I did not expect anything like that. Of course, electricity is on and you will not believe it but also connected.
Did the tanks fill up?