Put the summary of the bug you're having here
What I expected to happen was...:
it start playing minecraft
What actually happened was...:
it go than go back to the launcher page
Steps to Reproduce:
1. Put a step by step guide on how to trigger the bug here
2. you push play
3. than do it again
Please attach the complete output of the "Development console" tab of the launcher.
Click the text, press CTRL-A to select all, then CTRL-C to copy, and CTRL-V to paste in a comment on this ticket.
If the launcher closes after game start, please edit your profile and select "Launcher visibility" then, "Keep the launcher open".