[22:03:05 INFO]: pompiere1 issued server command: /slenderspawn
[22:03:05 ERROR]: null
org.bukkit.command.CommandException: Unhandled exception executing command 'slenderspawn' in plugin Slenderman v1.0
        at org.bukkit.command.PluginCommand.execute(PluginCommand.java:46) ~[spigot.jar:git-Spigot-596221b-9a1fc1e]
        at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:141) ~[spigot.jar:git-Spigot-596221b-9a1fc1e]
        at org.bukkit.craftbukkit.v1_12_R1.CraftServer.dispatchCommand(CraftServer.java:641) ~[spigot.jar:git-Spigot-596221b-9a1fc1e]
        at net.minecraft.server.v1_12_R1.PlayerConnection.handleCommand(PlayerConnection.java:1385) [spigot.jar:git-Spigot-596221b-9a1fc1e]
        at net.minecraft.server.v1_12_R1.PlayerConnection.a(PlayerConnection.java:1220) [spigot.jar:git-Spigot-596221b-9a1fc1e]
        at net.minecraft.server.v1_12_R1.PacketPlayInChat.a(PacketPlayInChat.java:45) [spigot.jar:git-Spigot-596221b-9a1fc1e]
        at net.minecraft.server.v1_12_R1.PacketPlayInChat.a(PacketPlayInChat.java:1) [spigot.jar:git-Spigot-596221b-9a1fc1e]
        at net.minecraft.server.v1_12_R1.PlayerConnectionUtils$1.run(SourceFile:13) [spigot.jar:git-Spigot-596221b-9a1fc1e]
        at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source) [?:1.8.0_211]
        at java.util.concurrent.FutureTask.run(Unknown Source) [?:1.8.0_211]
        at net.minecraft.server.v1_12_R1.SystemUtils.a(SourceFile:46) [spigot.jar:git-Spigot-596221b-9a1fc1e]
        at net.minecraft.server.v1_12_R1.MinecraftServer.D(MinecraftServer.java:747) [spigot.jar:git-Spigot-596221b-9a1fc1e]
        at net.minecraft.server.v1_12_R1.DedicatedServer.D(DedicatedServer.java:405) [spigot.jar:git-Spigot-596221b-9a1fc1e]
        at net.minecraft.server.v1_12_R1.MinecraftServer.C(MinecraftServer.java:678) [spigot.jar:git-Spigot-596221b-9a1fc1e]
        at net.minecraft.server.v1_12_R1.MinecraftServer.run(MinecraftServer.java:576) [spigot.jar:git-Spigot-596221b-9a1fc1e]
        at java.lang.Thread.run(Unknown Source) [?:1.8.0_211]
Caused by: java.lang.NullPointerException
        at org.bukkit.inventory.ItemStack.<init>(ItemStack.java:68) ~[spigot.jar:git-Spigot-596221b-9a1fc1e]
        at org.bukkit.inventory.ItemStack.<init>(ItemStack.java:46) ~[spigot.jar:git-Spigot-596221b-9a1fc1e]
        at eu.iamgio.slenderman.character.CharacterArmorStand.setHead(CharacterArmorStand.java:83) ~[?:?]
        at eu.iamgio.slenderman.character.SlendermanEntity.loadFromFile(SlendermanEntity.java:69) ~[?:?]
        at eu.iamgio.slenderman.spawning.SlendermanSpawningProcess.spawn(SlendermanSpawningProcess.java:61) ~[?:?]
        at eu.iamgio.slenderman.commands.SlenderSpawnCommand.onCommand(SlenderSpawnCommand.java:43) ~[?:?]
        at org.bukkit.command.PluginCommand.execute(PluginCommand.java:44) ~[spigot.jar:git-Spigot-596221b-9a1fc1e]
        ... 15 more