I join 1.10 but crash 2sec after loading the world

Crashs game when loading world

What I expected to happen was...:
Load in the world , And play

What actually happened was...:
Loads the world for 1 sec then crashs

Steps to Reproduce:
1. Log in
2. Play
3.Play on world(effects both multi and single)

The file has the crash / problem but cant read code.
3. ...