Attack of the B-team Crashes will loading into world

[ConspiracyGamer]

Every time I open my single player world it opens but just as it is about to load the world it says Shuting down eternal server and then closes! This is the crash log if it helps to figure out the problem.

    at net.minecraft.world.gen.structure.StructureStart.func_75068_a(StructureStart.java:47)
    at net.minecraft.world.gen.structure.MapGenStructure.func_75051_a(MapGenStructure.java:81)
    at net.minecraft.world.gen.ChunkProviderFlat.func_73153_a(SourceFile:125)
    at net.minecraft.world.gen.ChunkProviderServer.func_73153_a(ChunkProviderServer.java:258)
    at net.minecraft.world.chunk.Chunk.func_76624_a(Chunk.java:1253)
    at net.minecraft.world.gen.ChunkProviderServer.func_73158_c(ChunkProviderServer.java:153)
    at net.minecraft.server.management.PlayerInstance.<init>(PlayerInstance.java:43)
    at net.minecraft.server.management.PlayerManager.func_72690_a(SourceFile:208)
    at net.minecraft.server.management.PlayerManager.func_72683_a(SourceFile:240)
    at net.minecraft.server.management.ServerConfigurationManager.func_72375_a(ServerConfigurationManager.java:220)
    at net.minecraft.server.management.ServerConfigurationManager.func_72377_c(ServerConfigurationManager.java:268)
    at net.minecraft.server.management.ServerConfigurationManager.func_72355_a(ServerConfigurationManager.java:136)
    at net.minecraft.server.integrated.IntegratedServerListenThread.func_71747_b(IntegratedServerListenThread.java:97)
    at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:691)
    at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:587)
    at net.minecraft.server.integrated.IntegratedServer.func_71217_p(IntegratedServer.java:129)
    at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:484)
    at net.minecraft.server.ThreadMinecraftServer.run(SourceFile:583)

 Also, if you know how to fix it pls tell me!