My minecraft is opened but i go to world or sever says crash.

Put the summary of the bug you're having here

What I expected to happen was...:
Describe what you thought should happen here

What actually happened was...:
Describe what happened here

Steps to Reproduce:
1. Put a step by step guide on how to trigger the bug here
2. ...I opened the mincraft Its opened
3. .i go to worl or sever it says crash report..