I started the game and it crashed i dont know what happend or how to fix the problem

Put the summary of the bug you're having here

*What I expected to happen was...: to start the game normally
Describe what you thought should happen here
something with minecraft didn't go through properly
*What actually happened was...:Minecraft crashed
Describe what happened here

Steps to Reproduce:
1. Login and push play
2. ...
3. ...