cant launched minecraft

Put the summary of the bug you're having here

*What I expected to happen was...:*that i could play minecraft without any problem
Describe what you thought should happen here

What actually happened was...:
I click play and i wait some second
they tell me that minecraft as a bug
Describe what happened here

Steps to Reproduce:
1. Put a step by step guide on how to trigger the bug here
2. ...
3. ...