[18:13:07] [Server thread/INFO]: aDaxxas issued server command: /Spleef join spleef
[18:13:07] [Server thread/ERROR]: null
org.bukkit.command.CommandException: Unhandled exception executing command 'spleef' in plugin Spleef v1.5.10
        at org.bukkit.command.PluginCommand.execute(PluginCommand.java:47) ~[Spigot.jar:git-Spigot-56f8471-7554e08]
        at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:149) ~[Spigot.jar:git-Spigot-56f8471-7554e08]
        at org.bukkit.craftbukkit.v1_14_R1.CraftServer.dispatchCommand(CraftServer.java:710) ~[Spigot.jar:git-Spigot-56f8471-7554e08]
        at net.minecraft.server.v1_14_R1.PlayerConnection.handleCommand(PlayerConnection.java:1641) ~[Spigot.jar:git-Spigot-56f8471-7554e08]
        at net.minecraft.server.v1_14_R1.PlayerConnection.a(PlayerConnection.java:1481) ~[Spigot.jar:git-Spigot-56f8471-7554e08]
        at net.minecraft.server.v1_14_R1.PacketPlayInChat.a(PacketPlayInChat.java:47) ~[Spigot.jar:git-Spigot-56f8471-7554e08]
        at net.minecraft.server.v1_14_R1.PacketPlayInChat.a(PacketPlayInChat.java:1) ~[Spigot.jar:git-Spigot-56f8471-7554e08]
        at net.minecraft.server.v1_14_R1.PlayerConnectionUtils.lambda$0(PlayerConnectionUtils.java:19) ~[Spigot.jar:git-Spigot-56f8471-7554e08]
        at net.minecraft.server.v1_14_R1.TickTask.run(SourceFile:18) [Spigot.jar:git-Spigot-56f8471-7554e08]
        at net.minecraft.server.v1_14_R1.IAsyncTaskHandler.executeTask(SourceFile:144) [Spigot.jar:git-Spigot-56f8471-7554e08]
        at net.minecraft.server.v1_14_R1.IAsyncTaskHandlerReentrant.executeTask(SourceFile:23) [Spigot.jar:git-Spigot-56f8471-7554e08]
        at net.minecraft.server.v1_14_R1.IAsyncTaskHandler.executeNext(SourceFile:118) [Spigot.jar:git-Spigot-56f8471-7554e08]
        at net.minecraft.server.v1_14_R1.MinecraftServer.aX(MinecraftServer.java:909) [Spigot.jar:git-Spigot-56f8471-7554e08]
        at net.minecraft.server.v1_14_R1.MinecraftServer.executeNext(MinecraftServer.java:902) [Spigot.jar:git-Spigot-56f8471-7554e08]
        at net.minecraft.server.v1_14_R1.IAsyncTaskHandler.executeAll(SourceFile:103) [Spigot.jar:git-Spigot-56f8471-7554e08]
        at net.minecraft.server.v1_14_R1.MinecraftServer.sleepForTick(MinecraftServer.java:885) [Spigot.jar:git-Spigot-56f8471-7554e08]
        at net.minecraft.server.v1_14_R1.MinecraftServer.run(MinecraftServer.java:819) [Spigot.jar:git-Spigot-56f8471-7554e08]
        at java.lang.Thread.run(Thread.java:748) [?:1.8.0_221]
Caused by: java.lang.NoSuchMethodError: org.bukkit.inventory.PlayerInventory.getName()Ljava/lang/String;
        at fr.naruse.spleef.util.SpleefPlayer.registerInventory(SpleefPlayer.java:23) ~[Spleef.jar:?]
        at fr.naruse.spleef.game.spleef.Spleefs.addPlayer(Spleefs.java:147) ~[Spleef.jar:?]
        at fr.naruse.spleef.cmd.SpleefCommands.onCommand(SpleefCommands.java:73) ~[Spleef.jar:?]
        at org.bukkit.command.PluginCommand.execute(PluginCommand.java:45) ~[Spigot.jar:git-Spigot-56f8471-7554e08]
        ... 17 more