Game crashes when trying to create/load "Inspiration Island" world

Summary:
Game crashes when trying to create/load "Inspiration Island" world. The problem does not occur in version 1.18.12.

Steps to reproduce:

1. Download "Inspiration Island" world.
2. Create a world using the downloaded template.

Observed results:
The game will crash when trying to create a world (in the process of creating/opening).

Expected results:
When creating worlds that previously worked, there should definitely not be game crashes.