Unable to play and failure on loading versions.

Put the summary of the bug you're having here

*What I expected to happen was just click the play button.
Describe what you thought should happen here it should say play

*What actually happened was the play button wouldnt let me press it.
Describe what happened here The play button normal workes fine bit since its launcher updated to 1.3 (new launcher not old minecraft version) it wouldnt let me press the play button. I tried restarting my pc and it
still doesn't work. I think its failing to load versions

Steps to Reproduce:
1.Maybe playing minecraft before it suddenly updates it. then opening new launcher up while playing minecraft.
2.
3. ...