[19:32:09] [Server thread/INFO]: ziceptor has enforced a teleport of all players to them.
[19:35:12] [Server thread/FATAL]: Error executing task
java.util.concurrent.ExecutionException: java.lang.NullPointerException
    at java.util.concurrent.FutureTask.report(Unknown Source) ~[?:1.8.0_102]
    at java.util.concurrent.FutureTask.get(Unknown Source) ~[?:1.8.0_102]
    at net.minecraft.util.Util.func_181617_a(SourceFile:46) [h.class:?]
    at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:668) [MinecraftServer.class:?]
    at net.minecraft.server.dedicated.DedicatedServer.func_71190_q(DedicatedServer.java:387) [ld.class:?]
    at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:613) [MinecraftServer.class:?]
    at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:471) [MinecraftServer.class:?]
    at java.lang.Thread.run(Unknown Source) [?:1.8.0_102]
Caused by: java.lang.NullPointerException
    at com.google.common.collect.Iterables$3.transform(Iterables.java:512) ~[minecraft_server.1.10.2.jar:?]
    at com.google.common.collect.Iterables$3.transform(Iterables.java:509) ~[minecraft_server.1.10.2.jar:?]
    at com.google.common.collect.TransformedIterator.next(TransformedIterator.java:48) ~[minecraft_server.1.10.2.jar:?]
    at com.google.common.collect.Iterators$5.hasNext(Iterators.java:543) ~[minecraft_server.1.10.2.jar:?]
    at com.google.common.collect.ImmutableList.copyOf(ImmutableList.java:268) ~[minecraft_server.1.10.2.jar:?]
    at com.google.common.collect.ImmutableList.copyOf(ImmutableList.java:226) ~[minecraft_server.1.10.2.jar:?]
    at org.spongepowered.api.command.args.GenericArguments$FirstParsingCommandElement.complete(GenericArguments.java:476) ~[GenericArguments$FirstParsingCommandElement.class:1.10.2-2098-5.1.0-BETA-1814]
    at org.spongepowered.api.command.args.GenericArguments$SequenceCommandElement.complete(GenericArguments.java:305) ~[GenericArguments$SequenceCommandElement.class:1.10.2-2098-5.1.0-BETA-1814]
    at org.spongepowered.api.command.args.GenericArguments$FirstParsingCommandElement.lambda$complete$0(GenericArguments.java:483) ~[GenericArguments$FirstParsingCommandElement.class:1.10.2-2098-5.1.0-BETA-1814]
    at com.google.common.collect.Iterators$8.transform(Iterators.java:794) ~[minecraft_server.1.10.2.jar:?]
    at com.google.common.collect.TransformedIterator.next(TransformedIterator.java:48) ~[minecraft_server.1.10.2.jar:?]
    at com.google.common.collect.TransformedIterator.next(TransformedIterator.java:48) ~[minecraft_server.1.10.2.jar:?]
    at com.google.common.collect.Iterators$5.hasNext(Iterators.java:543) ~[minecraft_server.1.10.2.jar:?]
    at com.google.common.collect.ImmutableCollection$Builder.addAll(ImmutableCollection.java:300) ~[minecraft_server.1.10.2.jar:?]
    at com.google.common.collect.ImmutableList$Builder.addAll(ImmutableList.java:691) ~[minecraft_server.1.10.2.jar:?]
    at com.google.common.collect.ImmutableList.copyOf(ImmutableList.java:275) ~[minecraft_server.1.10.2.jar:?]
    at com.google.common.collect.ImmutableList.copyOf(ImmutableList.java:226) ~[minecraft_server.1.10.2.jar:?]
    at org.spongepowered.api.command.args.GenericArguments$FirstParsingCommandElement.complete(GenericArguments.java:476) ~[GenericArguments$FirstParsingCommandElement.class:1.10.2-2098-5.1.0-BETA-1814]
    at org.spongepowered.api.command.spec.CommandSpec.complete(CommandSpec.java:322) ~[CommandSpec.class:1.10.2-2098-5.1.0-BETA-1814]
    at org.spongepowered.api.command.args.ChildCommandElementExecutor.complete(ChildCommandElementExecutor.java:105) ~[ChildCommandElementExecutor.class:1.10.2-2098-5.1.0-BETA-1814]
    at org.spongepowered.api.command.args.GenericArguments$FirstParsingCommandElement.lambda$complete$0(GenericArguments.java:483) ~[GenericArguments$FirstParsingCommandElement.class:1.10.2-2098-5.1.0-BETA-1814]
    at com.google.common.collect.Iterators$8.transform(Iterators.java:794) ~[minecraft_server.1.10.2.jar:?]
    at com.google.common.collect.TransformedIterator.next(TransformedIterator.java:48) ~[minecraft_server.1.10.2.jar:?]
    at com.google.common.collect.TransformedIterator.next(TransformedIterator.java:48) ~[minecraft_server.1.10.2.jar:?]
    at com.google.common.collect.Iterators$5.hasNext(Iterators.java:543) ~[minecraft_server.1.10.2.jar:?]
    at com.google.common.collect.ImmutableList.copyOf(ImmutableList.java:268) ~[minecraft_server.1.10.2.jar:?]
    at com.google.common.collect.ImmutableList.copyOf(ImmutableList.java:226) ~[minecraft_server.1.10.2.jar:?]
    at org.spongepowered.api.command.args.GenericArguments$FirstParsingCommandElement.complete(GenericArguments.java:476) ~[GenericArguments$FirstParsingCommandElement.class:1.10.2-2098-5.1.0-BETA-1814]
    at org.spongepowered.api.command.spec.CommandSpec.complete(CommandSpec.java:322) ~[CommandSpec.class:1.10.2-2098-5.1.0-BETA-1814]
    at org.spongepowered.api.command.spec.CommandSpec.getSuggestions(CommandSpec.java:361) ~[CommandSpec.class:1.10.2-2098-5.1.0-BETA-1814]
    at org.spongepowered.api.command.dispatcher.SimpleDispatcher.getSuggestions(SimpleDispatcher.java:348) ~[SimpleDispatcher.class:1.10.2-2098-5.1.0-BETA-1814]
    at org.spongepowered.common.command.SpongeCommandManager.getSuggestions(SpongeCommandManager.java:347) ~[SpongeCommandManager.class:1.10.2-2098-5.1.0-BETA-1814]
    at net.minecraft.command.ServerCommandManager.func_180524_a(SourceFile:168) ~[bd.class:?]
    at net.minecraft.server.MinecraftServer.func_184104_a(MinecraftServer.java:860) ~[MinecraftServer.class:?]
    at net.minecraft.network.NetHandlerPlayServer.func_147341_a(NetHandlerPlayServer.java:1286) ~[me.class:?]
    at net.minecraft.network.play.client.CPacketTabComplete.func_148833_a(SourceFile:52) ~[il.class:?]
    at net.minecraft.network.play.client.CPacketTabComplete.func_148833_a(SourceFile:11) ~[il.class:?]
    at org.spongepowered.common.network.PacketUtil.onProcessPacket(PacketUtil.java:123) ~[PacketUtil.class:1.10.2-2098-5.1.0-BETA-1814]
    at net.minecraft.network.PacketThreadUtil$1.redirect$onProcessPacket$zjc000(SourceFile:39) ~[fl$1.class:?]
    at net.minecraft.network.PacketThreadUtil$1.run(SourceFile:13) ~[fl$1.class:?]
    at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source) ~[?:1.8.0_102]
    at java.util.concurrent.FutureTask.run(Unknown Source) ~[?:1.8.0_102]
    at net.minecraft.util.Util.func_181617_a(SourceFile:45) ~[h.class:?]
    ... 5 more