Agora que vi..
Apos pesquisar um pouco desse erro achei varios porem em modo de Crash-report.
...
Achei um CrashReport na internet do minecraft original porem deve servir igual:
---- Minecraft Crash Report ----
// Ouch. That hurt
Time: 8/8/14 8:59 AM
Description: Starting integrated server
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 ns.b(SourceFile:156)
at ns.<init>(SourceFile:42)
at net.minecraft.server.MinecraftServer.<init>(SourceFile:114)
at bsx.<init>(SourceFile:38)
at bao.a(SourceFile:1610)
at bdx.e(SourceFile:162)
at bdx.a(SourceFile:127)
at bdw.a(SourceFile:172)
at bdw.k(SourceFile:232)
at bdw.p(SourceFile:211)
at bao.p(SourceFile:1328)
at bao.ak(SourceFile:774)
at bao.f(SourceFile:728)
at net.minecraft.client.main.Main.main(SourceFile:148)
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)
[...] Tinha muito mais..
Muitos tem crash devido muitos Mods.
Ja tentou logar nos servidores sem Mods?
Crash pode não ser igual o seu erro porem acredito que em alguns casos em vez do launcher da craftlandia (titan no caso) crashar ele mostra o erro.
(posso estar errado mas não custa tentar ajudar)
Clique para expandir...