wunai issued server command: /loreitemlevel up
[16:06:17] [Server thread/ERROR] [net.minecraft.network.NetHandlerPlayServer]: null
org.bukkit.command.CommandException: Unhandled exception executing command 'loreitemlevel' in plugin LoreItemLevel v1.0
at org.bukkit.command.PluginCommand.execute(PluginCommand.java:46) ~[PluginCommand.class:git-CatServer-1.12.2-8cf55c8]
at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:144) ~[SimpleCommandMap.class:git-CatServer-1.12.2-8cf55c8]
at org.bukkit.craftbukkit.v1_12_R1.CraftServer.dispatchCommand(CraftServer.java:709) ~[CraftServer.class:git-CatServer-1.12.2-8cf55c8]
at net.minecraft.network.NetHandlerPlayServer.func_147361_d(NetHandlerPlayServer.java:1594) [pa.class:?]
at net.minecraft.network.NetHandlerPlayServer.func_147354_a(NetHandlerPlayServer.java:1439) [pa.class:?]
at net.minecraft.network.play.client.CPacketChatMessage.func_148833_a(SourceFile:37) [la.class:?]
at net.minecraft.network.play.client.CPacketChatMessage.func_148833_a(SourceFile:9) [la.class:?]
at net.minecraft.network.PacketThreadUtil$1.run(SourceFile:13) [hv$1.class:?]
at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source) [?:1.8.0_211]
at java.util.concurrent.FutureTask.run(Unknown Source) [?:1.8.0_211]
at net.minecraft.util.Util.func_181617_a(SourceFile:46) [h.class:?]
at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:838) [MinecraftServer.class:?]
at net.minecraft.server.dedicated.DedicatedServer.func_71190_q(DedicatedServer.java:472) [nz.class:?]
at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:775) [MinecraftServer.class:?]
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:629) [MinecraftServer.class:?]
at java.lang.Thread.run(Unknown Source) [?:1.8.0_211]
Caused by: java.lang.NoSuchMethodError: org.bukkit.Material.isAir()Z
at fun.mcpc.pilock.LoreItemLevel.updateItem(LoreItemLevel.java:65) ~[?:?]
at fun.mcpc.pilock.LoreItemLevel.onCommand(LoreItemLevel.java:181) ~[?:?]
at org.bukkit.command.PluginCommand.execute(PluginCommand.java:44) ~[PluginCommand.class:git-CatServer-1.12.2-8cf55c8]
... 15 more