the minecraft that I use loads up to the launcher then launches but on the Mojang screen it crashes

Put the summary of the bug you're having here

What I expected to happen was that Minecraft would load up and i would start playing

What actually happened was at the Mojang page the minecraft that I use crashed

Steps to Reproduce:
1. I open the launcher
2. Waited for the launcher to load and say play
3. Clicked Play and waited
4. Minecraft booted up
5. Crashed on the Mojang opening