unable to play mincraft crashes when loading

Put the summary of the bug you're having here

*What I expected to happen was..play the game
Describe what you thought should happen here

*What actually happened was...i received an error and game did not load
the only option was to send the error report.

Steps to Reproduce:
1. selected download
2. saved file
3. selected run
4. selected play
4. started to run then gave error report instead of playing the game