My Minecraft is crashing every time I open a world.

Obviously, I expected to be dropped into my Minecraft world.

But what actually happened was it closing instantly and crashing. I have no idea what all the messages mean, but it said many things, as in "ExceptionInInializerError", "ChannelException" and even "IllegalStateException" ?!

Steps to Reproduce:
1. Open Minecraft in my downloads
2. Opened my word "DERP" (Yes, that's it's name...)
3. It always simply crashes.