Game crash rendering entity

The game crashed trying to render an entity. I don't know which one, and I can't find out because the world crashes as soon as it is loaded.

What I expected to happen was...:
The game to run normally

What actually happened was...:
It crashed

Steps to Reproduce:
I don't really know, it just crashed when I was playing and stated that there was an error rendering an entity.

Notes:
The two crash reports looked identical.