I am attempting to enter Nuka World, but every entrance to the transit is considered out of the map, and there is an invisible barrier. How do I get into Nuka World?
I entered Nuka World last night. The Nuka-World Transit Center is way to the west edge of the map.
I fast traveled to the Lonely Chapel to its northeast, and just walked right up to it. There's a highway that leads into the main entrance.
I didn't want to enter the main entrance, since there were enemies there and I was using a stealth character, but I found a gap in the fence to the north of the main entrance.
Here's a video on YouTube of someone approaching the transit center from the Sunshine Tidings Co-Op. The transit center comes into view around 4:40.