it crashed when i was creating a new world :(

Put the summary of the bug you're having here

What I expected to happen was...:
Describe what you thought should happen here
get a randomly spawned world
What actually happened was...:
Describe what happened here
it crashed
Steps to Reproduce:
1. Put a step by step guide on how to trigger the bug here
2. ...click create a new world
3. ...do what ever settings the hit okay then it wont load