I also have this issue. When I create the world, I don't mess with the strings or try to unlock them, I just select to create (locally not a realm). I load into an empty room shaped like a plus sign, with wood, wool, and glazed terracota. When I move forward a bit I get text that only says "avatar.intro, music.onboard" but nothing ever happens. I'm stuck in this room with nothing similar to the images shown in the marketplace. The skins as part of the pack work no issue just the world.
I also have this issue. When I create the world, I don't mess with the strings or try to unlock them, I just select to create (locally not a realm). I load into an empty room shaped like a plus sign, with wood, wool, and glazed terracota. When I move forward a bit I get text that only says "avatar.intro, music.onboard" but nothing ever happens. I'm stuck in this room with nothing similar to the images shown in the marketplace. The skins as part of the pack work no issue just the world.