I can reproduce the issue on the latest snapshot. Be sure to include the attached data pack. Since it adds a new dimension, a simple /reload won't do; you need to fully close the world and rejoin it if you're adding the pack to an already existing world.
I can reproduce the issue on the latest snapshot. Be sure to include the attached data pack. Since it adds a new dimension, a simple /reload won't do; you need to fully close the world and rejoin it if you're adding the pack to an already existing world.