13.09 19:10:08 [Server] INFO ... 15 more
13.09 19:10:08 [Server] INFO at org.bukkit.command.PluginCommand.execute(PluginCommand.java:44) ~[craftbukkit-1.12.2.jar:git-Bukkit-2b93d83]
13.09 19:10:08 [Server] INFO at com.cyber.mobheads.Main.onCommand(Main.java:154) ~[?:?]
13.09 19:10:08 [Server] INFO at com.cyber.mobheads.Main.giveMobSkull(Main.java:207) ~[?:?]
13.09 19:10:08 [Server] INFO at com.cyber.mobheads.Utilities.SkullFactory.getMobSkull(SkullFactory.java:49) ~[?:?]
13.09 19:10:08 [Server] INFO at com.cyber.mobheads.Utilities.SkullFactory.getVanillaSkull(SkullFactory.java:103) ~[?:?]
13.09 19:10:08 [Server] INFO Caused by: java.lang.NoSuchFieldError: SKELETON_SKULL
13.09 19:10:08 [Server] INFO at java.lang.Thread.run(Unknown Source) [?:1.8.0_181]
13.09 19:10:08 [Server] INFO at net.minecraft.server.v1_12_R1.MinecraftServer.run(MinecraftServer.java:555) [craftbukkit-1.12.2.jar:git-Bukkit-2b93d83]
13.09 19:10:08 [Server] INFO at net.minecraft.server.v1_12_R1.MinecraftServer.C(MinecraftServer.java:651) [craftbukkit-1.12.2.jar:git-Bukkit-2b93d83]
13.09 19:10:08 [Server] INFO at net.minecraft.server.v1_12_R1.DedicatedServer.D(DedicatedServer.java:371) [craftbukkit-1.12.2.jar:git-Bukkit-2b93d83]
13.09 19:10:08 [Server] INFO at net.minecraft.server.v1_12_R1.MinecraftServer.D(MinecraftServer.java:696) [craftbukkit-1.12.2.jar:git-Bukkit-2b93d83]
13.09 19:10:08 [Server] INFO at net.minecraft.server.v1_12_R1.SystemUtils.a(SourceFile:46) [craftbukkit-1.12.2.jar:git-Bukkit-2b93d83]
13.09 19:10:08 [Server] INFO at java.util.concurrent.FutureTask.run(Unknown Source) [?:1.8.0_181]
13.09 19:10:08 [Server] INFO at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source) [?:1.8.0_181]
13.09 19:10:08 [Server] INFO at net.minecraft.server.v1_12_R1.PlayerConnectionUtils$1.run(SourceFile:13) [craftbukkit-1.12.2.jar:git-Bukkit-2b93d83]
13.09 19:10:08 [Server] INFO at net.minecraft.server.v1_12_R1.PacketPlayInChat.a(SourceFile:9) [craftbukkit-1.12.2.jar:git-Bukkit-2b93d83]
13.09 19:10:08 [Server] INFO at net.minecraft.server.v1_12_R1.PacketPlayInChat.a(SourceFile:37) [craftbukkit-1.12.2.jar:git-Bukkit-2b93d83]
13.09 19:10:08 [Server] INFO at net.minecraft.server.v1_12_R1.PlayerConnection.a(PlayerConnection.java:1198) [craftbukkit-1.12.2.jar:git-Bukkit-2b93d83]
13.09 19:10:08 [Server] INFO at net.minecraft.server.v1_12_R1.PlayerConnection.handleCommand(PlayerConnection.java:1338) [craftbukkit-1.12.2.jar:git-Bukkit-2b93d83]
13.09 19:10:08 [Server] INFO at org.bukkit.craftbukkit.v1_12_R1.CraftServer.dispatchCommand(CraftServer.java:628) ~[craftbukkit-1.12.2.jar:git-Bukkit-2b93d83]
13.09 19:10:08 [Server] INFO at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:140) ~[craftbukkit-1.12.2.jar:git-Bukkit-2b93d83]
13.09 19:10:08 [Server] INFO at org.bukkit.command.PluginCommand.execute(PluginCommand.java:46) ~[craftbukkit-1.12.2.jar:git-Bukkit-2b93d83]
13.09 19:10:08 [Server] INFO org.bukkit.command.CommandException: Unhandled exception executing command 'mobhead' in plugin MobHeads v2.3
13.09 19:10:08 [Server] ERROR null