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org.bukkit.command.CommandException: Unhandled exception executing command 'is' in plugin ASkyBlock v3.0.6.8 at org.bukkit.command.PluginCommand.execute(PluginCommand.java:46)[Spigot.jar:git-Spigot-de459a2-51263e9] at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:141)[Spigot.jar:git-Spigot-de459a2-51263e9] at org.bukkit.craftbukkit.v1_10_R1.CraftServer.dispatchCommand(CraftServer.java:647)[Spigot.jar:git-Spigot-de459a2-51263e9] at net.minecraft.server.v1_10_R1.PlayerConnection.handleCommand(PlayerConnection.java:1358)[Spigot.jar:git-Spigot-de459a2-51263e9] at net.minecraft.server.v1_10_R1.PlayerConnection.a(PlayerConnection.java:1193)[Spigot.jar:git-Spigot-de459a2-51263e9] at net.minecraft.server.v1_10_R1.PacketPlayInChat.a(PacketPlayInChat.java:45)[Spigot.jar:git-Spigot-de459a2-51263e9] at net.minecraft.server.v1_10_R1.PacketPlayInChat.a(PacketPlayInChat.java:1)[Spigot.jar:git-Spigot-de459a2-51263e9] at net.minecraft.server.v1_10_R1.PlayerConnectionUtils$1.run(SourceFile:13)[Spigot.jar:git-Spigot-de459a2-51263e9] at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)[?:1.8.0_131] at java.util.concurrent.FutureTask.run(FutureTask.java:266)[?:1.8.0_131] at net.minecraft.server.v1_10_R1.SystemUtils.a(SourceFile:45)[Spigot.jar:git-Spigot-de459a2-51263e9] at net.minecraft.server.v1_10_R1.MinecraftServer.D(MinecraftServer.java:732)[Spigot.jar:git-Spigot-de459a2-51263e9] at net.minecraft.server.v1_10_R1.DedicatedServer.D(DedicatedServer.java:400)[Spigot.jar:git-Spigot-de459a2-51263e9] at net.minecraft.server.v1_10_R1.MinecraftServer.C(MinecraftServer.java:668)[Spigot.jar:git-Spigot-de459a2-51263e9] at net.minecraft.server.v1_10_R1.MinecraftServer.run(MinecraftServer.java:567)[Spigot.jar:git-Spigot-de459a2-51263e9] at java.lang.Thread.run(Thread.java:748)[?:1.8.0_131]Caused by: org.bukkit.command.CommandException: Unhandled exception executing command 'island' in plugin ASkyBlock v3.0.6.8 at org.bukkit.command.PluginCommand.execute(PluginCommand.java:46)[Spigot.jar:git-Spigot-de459a2-51263e9] at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:141)[Spigot.jar:git-Spigot-de459a2-51263e9] at org.bukkit.craftbukkit.v1_10_R1.CraftServer.dispatchCommand(CraftServer.java:647)[Spigot.jar:git-Spigot-de459a2-51263e9] at org.bukkit.craftbukkit.v1_10_R1.entity.CraftPlayer.performCommand(CraftPlayer.java:243)[Spigot.jar:git-Spigot-de459a2-51263e9] at com.wasteofplastic.askyblock.commands.IslandCmd.onCommand(IslandCmd.java:1076)[?:?] at org.bukkit.command.PluginCommand.execute(PluginCommand.java:44)[Spigot.jar:git-Spigot-de459a2-51263e9] ... 15 moreCaused by: java.lang.NullPointerException at org.bukkit.craftbukkit.v1_10_R1.entity.CraftHumanEntity.openInventory(CraftHumanEntity.java:183)[Spigot.jar:git-Spigot-de459a2-51263e9] at com.wasteofplastic.askyblock.commands.IslandCmd.onCommand(IslandCmd.java:1386)[?:?] at org.bukkit.command.PluginCommand.execute(PluginCommand.java:44)[Spigot.jar:git-Spigot-de459a2-51263e9] ... 20 more