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Whenever I log onto a specific servers hub I am fine but when I log onto factions my game crashes. Crash report is as follows. I know for a fact based on the crash report that it has something to do with the scoreboard.

---- Minecraft Crash Report ----
// Ouch. That hurt

Time: 7/10/15 12:05 PM
Description: Unexpected error

java.lang.NullPointerException: Unexpected error
at net.minecraft.scoreboard.Scoreboard.func_96511_d(SourceFile:169)
at net.minecraft.client.network.NetHandlerPlayClient.func_147247_a(NetHandlerPlayClient.java:1585)
at net.minecraft.network.play.server.S3EPacketTeams.func_148833_a(SourceFile:100)
at net.minecraft.network.play.server.S3EPacketTeams.func_148833_a(SourceFile:12)
at net.minecraft.network.NetworkManager.func_74428_b(NetworkManager.java:212)
at net.minecraft.client.multiplayer.PlayerControllerMP.func_78765_e(PlayerControllerMP.java:273)
at net.minecraft.client.Minecraft.func_71407_l(Minecraft.java:1602)
at net.minecraft.client.Minecraft.func_71411_J(Minecraft.java:973)
at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:898)
at net.minecraft.client.main.Main.main(SourceFile:148)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at net.minecraft.launchwrapper.Launch.launch(Launch.java:135)
at net.minecraft.launchwrapper.Launch.main(Launch.java:28)

Full crash report please.