After setting the superflat preset the game crashes

The bug:

When the player sets the superflat preset the game crashes

Steps to Reproduce:

1. Click on the create new world option

2. Click on the world option

3. Select world type for superflat

4. Click on customize and select any one

5. Click on Use the preset

Observed Results:

The game crashes

Expected Results:

The preset is saved and world creation continues normally.