[MCM-150] Game crashes when loading new map from store.

build: 572666

Summary:
When loading a map from the marketplace store for the first time the game will crash instead of create the world.

Impact:
This very negatively impacts the user experience because they then have to open minecraft again.

Repro steps:
1. open minecraft fresh
2. go to store page
3. download a world
4. press create button

Observed behavior:
game crashes
Expected behavior:
game should create the world and let the player play.