Since the update, I cannot use Minecraft online. (When off line it works normally apart from not having any sound). The launcher loads normally, although there are a few errors. But at the end it states: Version & Libraries' finished successfully. But it just goes dead.

*What I expected to happen was when the launcher finishes Minecraft should pop up and start"

*What actually happened was the launcher finishes, but nothing happens. I have to close it down, go off line and then restart and it goes ahead.

Steps to Reproduce:
1. Double click Minecraft
2. Launcher loads
3. Click Play
4. Blue line moves across from left to right to the end.
5. Then nothing, it simply sits there doing nothing.
6. "Play" button is grey and unresponsive.