Any world I try to load-- online or mult. the game crashes.

Put the summary of the bug you're having here

*What I expected to happen was...:
Describe what you thought should happen here
Load the world
What actually happened was...:
Describe what happened here
Game crashed
Steps to Reproduce:
1. Put a step by step guide on how to trigger the bug here
2. ...Press on play then load server then game crashes
3. ...