Whenever I attempt to create a world or log into a server in versions 1.9 and above, the world loading screen appears, reaches 100%, then shows me 'joining world' and finally 'saving world', where it gets stuck completely (I left it for 45 minutes just to make sure). If I click any keys during any point past this, or attempt to switch the screen, the game crashes and gives me an error 'OpenJDK Platform binary is not opening: if you close the program, you might lose information'. How exactly do I fix this?