BungeeCord Spam Error

My Bungeecord console gets spammed, reaching hundreds of lines with this message:


03:43:27 [SEVERE] [/127.0.0.1:49059] <-> InitialHandler - encountered exception
java.lang.NullPointerException
at a.a.a.c.b.a.f.a(Unknown Source)
at a.a.a.c.b.h.a(Unknown Source)
at a.a.a.c.g.a(Unknown Source)
at a.a.a.b.c.b.handle(Unknown Source)
at net.md_5.bungee.netty.HandlerBoss.channelRead(HandlerBoss.java:75)
at...

BungeeCord Spam Error