Game Crashes

Put the summary of the bug you're having here

What I expected to happen was...:
When I log in and click play the game usually opens.

What actually happened was...:
When I log in and click play a Crash Report opens instead of the game.

Steps to Reproduce:
1. Click the Minecraft icon
2. ...Log in page opens
3. ...Click the Play button
4. ...Crash Report log opens