Hopper: java.lang.IllegalArgumentException: Name and ID cannot both be blank

java.lang.IllegalArgumentException: Name and ID cannot both be blank
	at com.mojang.authlib.GameProfile.<init>(GameProfile.java:25)
	at anb.a(SourceFile:134)
	at amd.c(SourceFile:171)
	at amd.a(SourceFile:106)
	at agv.b(SourceFile:441)
	at agx.a(SourceFile:753)
	at qv.a(SourceFile:116)

---- Minecraft Crash Report ----
// Don't be sad. I'll do better next time, I promise!

Time: 8/13/14 12:00 PM
Description: Loading entity NBT

java.lang.IllegalArgumentException: Name and ID cannot both be blank
	at com.mojang.authlib.GameProfile.<init>(GameProfile.java:25)
	at anb.a(SourceFile:134)
	at amd.c(SourceFile:171)
	at amd.a(SourceFile:106)
	at agv.b(SourceFile:441)
	at agx.a(SourceFile:753)
	at qv.a(SourceFile:116)
	at wu.f(SourceFile:1235)
	at bqg.b(SourceFile:198)
	at sm.a(SourceFile:243)
	at sm.a(SourceFile:91)
	at rp.b(SourceFile:96)
	at rp.c(SourceFile:54)
	at gq.a(SourceFile:187)
	at rb.c(SourceFile:151)
	at net.minecraft.server.MinecraftServer.z(SourceFile:625)
	at net.minecraft.server.MinecraftServer.y(SourceFile:531)
	at cya.y(SourceFile:155)
	at net.minecraft.server.MinecraftServer.run(SourceFile:447)
	at java.lang.Thread.run(Unknown Source)


A detailed walkthrough of the error, its code path and all known details is as follows:
---------------------------------------------------------------------------------------

-- Head --
Stacktrace:
	at com.mojang.authlib.GameProfile.<init>(GameProfile.java:25)
	at anb.a(SourceFile:134)
	at amd.c(SourceFile:171)
	at amd.a(SourceFile:106)
	at agv.b(SourceFile:441)
	at agx.a(SourceFile:753)
	at qv.a(SourceFile:116)

-- Entity being loaded --
Details:
	Entity Type: null (qv)
	Entity ID: 200
	Entity Name: FaithCat2002
	Entity's Exact location: -76.97, 94.00, 225.12
	Entity's Block location: -77.00,94.00,225.00 - World: (-77,94,225), Chunk: (at 3,5,1 in -5,14; contains blocks -80,0,224 to -65,255,239), Region: (-1,0; contains chunks -32,0 to -1,31, blocks -512,0,0 to -1,255,511)
	Entity's Momentum: 0.00, -0.08, 0.00
	Entity's Rider: ~~ERROR~~ NullPointerException: null
	Entity's Vehicle: ~~ERROR~~ NullPointerException: null
Stacktrace:
	at wu.f(SourceFile:1235)
	at bqg.b(SourceFile:198)
	at sm.a(SourceFile:243)
	at sm.a(SourceFile:91)
	at rp.b(SourceFile:96)
	at rp.c(SourceFile:54)
	at gq.a(SourceFile:187)

-- Ticking connection --
Details:
	Connection: gq@1e050c6
Stacktrace:
	at rb.c(SourceFile:151)
	at net.minecraft.server.MinecraftServer.z(SourceFile:625)
	at net.minecraft.server.MinecraftServer.y(SourceFile:531)
	at cya.y(SourceFile:155)
	at net.minecraft.server.MinecraftServer.run(SourceFile:447)
	at java.lang.Thread.run(Unknown Source)

-- System Details --
Details:
	Minecraft Version: 14w33a
	Operating System: Windows 8 (x86) version 6.2
	Java Version: 1.7.0_45, Oracle Corporation
	Java VM Version: Java HotSpot(TM) Client VM (mixed mode), Oracle Corporation
	Memory: 95238352 bytes (90 MB) / 252751872 bytes (241 MB) up to 523501568 bytes (499 MB)
	JVM Flags: 6 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx512M -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode -XX:-UseAdaptiveSizePolicy -Xmn128M
	IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
	Profiler Position: N/A (disabled)
	Player Count: 0 / 8; []
	Type: Integrated Server (map_client.txt)
	Is Modded: Probably not. Jar signature remains and both client + server brands are untouched.