Minecraft 1.8 will Log In but Will Not Play

[14:34:31] [Client thread/INFO]: Setting user: Jayhawk816
[14:34:31] [Client thread/INFO]: (Session ID is token:1f945bb0432041ccba27a4a55f5ccc22:061a345caf31401e82e53e20db2378a8)
Exception in thread "Client thread" com.google.gson.JsonSyntaxException: java.lang.IllegalStateException: Expected BEGIN_ARRAY but was STRING at line 1 column 1
	at com.google.gson.Gson.fromJson(Gson.java:815)
	at com.google.gson.Gson.fromJson(Gson.java:768)
	at sa.b(SourceFile:148)
	at sa.<init>(SourceFile:42)
	at net.minecraft.server.MinecraftServer.<init>(SourceFile:154)
	at cyk.<init>(SourceFile:40)
	at bss.<init>(SourceFile:285)
	at net.minecraft.client.main.Main.main(SourceFile:124)
Caused by: java.lang.IllegalStateException: Expected BEGIN_ARRAY but was STRING at line 1 column 1
	at com.google.gson.stream.JsonReader.beginArray(JsonReader.java:338)
	at com.google.gson.internal.bind.CollectionTypeAdapterFactory$Adapter.read(CollectionTypeAdapterFactory.java:79)
	at com.google.gson.internal.bind.CollectionTypeAdapterFactory$Adapter.read(CollectionTypeAdapterFactory.java:60)
	at com.google.gson.Gson.fromJson(Gson.java:803)
	... 7 more
Java HotSpot(TM) Client VM warning: Using incremental CMS is deprecated and will likely be removed in a future release