After pressing "PLAY" on the launcher, game immediately crashes.

Put the summary of the bug you're having here

*What I expected to happen was...:The game to start and download the update.
Describe what you thought should happen here
Game to download and run normally.
*What actually happened was...:Game crashed immediately after pressing "PLAY" on the launcher.
Describe what happened here
Launcher loaded the game and appeared to download the update, and after a few seconds of waiting after the launcher disappeared, the crash report popped up.
Steps to Reproduce:
1. Open Minecraft Launcher
2. Press "PLAY"
3. Game crashes immediately