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java.lang.NullPointerException: Ticking screen	at com.mojang.util.UUIDTypeAdapter.fromUUID(UUIDTypeAdapter.java:22)	at com.mojang.util.UUIDTypeAdapter.write(UUIDTypeAdapter.java:13)	at com.mojang.util.UUIDTypeAdapter.write(UUIDTypeAdapter.java:10)	at com.google.gson.internal.bind.TypeAdapterRuntimeTypeWrapper.write(TypeAdapterRuntimeTypeWrapper.java:68)	at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$1.write(ReflectiveTypeAdapterFactory.java:89)	at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$Adapter.write(ReflectiveTypeAdapterFactory.java:195)	at com.google.gson.Gson.toJson(Gson.java:593)	at com.google.gson.Gson.toJson(Gson.java:572)	at com.google.gson.Gson.toJson(Gson.java:527)	at com.google.gson.Gson.toJson(Gson.java:507)	at com.mojang.authlib.yggdrasil.YggdrasilAuthenticationService.makeRequest(YggdrasilAuthenticationService.java:54)	at com.mojang.authlib.yggdrasil.YggdrasilMinecraftSessionService.joinServer(YggdrasilMinecraftSessionService.java:61)	at bll.a(SourceFile:48)	at jt.a(SourceFile:41)	at jt.a(SourceFile:10)	at ej.a(SourceFile:174)	at bct.c(SourceFile:78)	at ban.p(SourceFile:1343)	at ban.ak(SourceFile:774)	at ban.f(SourceFile:728)	at net.minecraft.client.main.Main.main(SourceFile:148)