Wont let me play, just crashes.

I open the launcher and click play, it loads for a second then the window disappears. A few seconds later it pops back up and says game crashed. I've received a few different crash codes here are a few of them but this is the one i'm receiving now.
The game crashed whilst initializing game
Error: java.lang.IllegalStateException: Could not load icon: Image not of any known type, or corrupt