[04:45:30] [Server thread/ERROR] [Sponge/]: Error occurred while executing command 'nation create Test' for source EntityPlayerMP['Mystz'/227, l='world', x=755.94, y=65.00, z=369.09]: org.spongepowered.api.service.economy.EconomyService.getOrCreateAccount(Ljava/util/UUID;)Ljava/util/Optional;
java.lang.NoSuchMethodError: org.spongepowered.api.service.economy.EconomyService.getOrCreateAccount(Ljava/util/UUID;)Ljava/util/Optional;
	at com.arckenver.nations.cmdexecutor.NationCreateExecutor.execute(NationCreateExecutor.java:79) ~[NationCreateExecutor.class:0.1]
	at org.spongepowered.api.command.args.ChildCommandElementExecutor.execute(ChildCommandElementExecutor.java:177) ~[ChildCommandElementExecutor.class:1.8.9-1722-3.1.0-BETA-1136]
	at org.spongepowered.api.command.spec.CommandSpec.process(CommandSpec.java:332) ~[CommandSpec.class:1.8.9-1722-3.1.0-BETA-1136]
	at org.spongepowered.api.command.dispatcher.SimpleDispatcher.process(SimpleDispatcher.java:331) ~[SimpleDispatcher.class:1.8.9-1722-3.1.0-BETA-1136]
	at org.spongepowered.common.command.SpongeCommandManager.process(SpongeCommandManager.java:252) [SpongeCommandManager.class:1.8.9-1722-3.1.0-BETA-1136]
	at net.minecraft.command.ServerCommandManager.func_71556_a(SourceFile:83) [bd.class:?]
	at net.minecraft.network.NetHandlerPlayServer.func_147361_d(NetHandlerPlayServer.java:809) [lm.class:?]
	at net.minecraft.network.NetHandlerPlayServer.func_147354_a(NetHandlerPlayServer.java:788) [lm.class:?]
	at net.minecraft.network.play.client.C01PacketChatMessage.func_148833_a(SourceFile:37) [ie.class:?]
	at net.minecraft.network.play.client.C01PacketChatMessage.func_148833_a(SourceFile:9) [ie.class:?]
	at org.spongepowered.common.network.PacketUtil.onProcessPacket(PacketUtil.java:106) [PacketUtil.class:1.8.9-1722-3.1.0-BETA-1136]
	at net.minecraft.network.PacketThreadUtil$1.onProcessPacket(SourceFile:51) [fh$1.class:?]
	at net.minecraft.network.PacketThreadUtil$1.run(SourceFile:13) [fh$1.class:?]
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) [?:1.8.0_66]
	at java.util.concurrent.FutureTask.run(FutureTask.java:266) [?:1.8.0_66]
	at net.minecraft.util.Util.func_181617_a(SourceFile:44) [g.class:?]
	at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:660) [MinecraftServer.class:?]
	at net.minecraft.server.dedicated.DedicatedServer.func_71190_q(DedicatedServer.java:344) [ko.class:?]
	at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:605) [MinecraftServer.class:?]
	at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:481) [MinecraftServer.class:?]
	at java.lang.Thread.run(Thread.java:745) [?:1.8.0_66]