when press play button on launcher just goes back to same page

Put the summary of the bug you're having here

What I expected to happen was...:
had for 2 weeks and what normally happened was when pressed play button on launcher page would then get access to play game

What actually happened was...:
when pressed play button just keeps going back to same page and game will not load. have tried re downloading through google chrome but still same issue.

Steps to Reproduce:
1. Put a step by step guide on how to trigger the bug here
launch minecraft
2. ...from launcher press play button

3. ...