JAVA.LANG.NULLPOINTEREXCEPTION: GROUP WTF

Okay, I think that if I don't fix this error when I join minecraft servers I can play at all on mc anymore The Error says: java.lang.NullPointerException: group and I did not modify minecraft at all. and when I try joining this is my log

[16:55:14] [Client thread/INFO]: Setting user: Radish
[16:55:14] [Client thread/INFO]: (Session ID is token:[Bloooooooooooooooooooooooooooooooooooooooooooocked ])
[16:55:19] [Client thread/INFO]: LWJGL Version: 2.9.1
[16:55:24] [Client thread/INFO]: Reloading ResourceManager: Default, iBeatPvP.zip
[16:55:26] [Sound Library Loader/INFO]: Starting up SoundSystem...
[16:55:26] [Thread-6/INFO]: Initializing LWJGL OpenAL
[16:55:26] [Thread-6/INFO]: (The LWJGL binding of OpenAL. For more information, see http://www.lwjgl.org)
[16:55:26] [Thread-6/INFO]: OpenAL initialized.
[16:55:26] [Sound Library Loader/INFO]: Sound engine started
[16:55:46] [Client thread/INFO]: Created: 2048x2048 textures-atlas
[16:56:15] [Client thread/INFO]: Connecting to na.badlion.net, 25565
[16:56:15] [Server Connector #1/ERROR]: Couldn't connect to server
java.lang.NullPointerException: group
at io.netty.bootstrap.AbstractBootstrap.group(AbstractBootstrap.java:80) ~[netty-all-4.0.23.Final.jar:4.0.23.Final]
at gr.a(SourceFile:247) ~[1.8.1.jar:?]
at bwa.run(SourceFile:59) [1.8.1.jar:?]
PLEASE HELP