[19:11:44] [Server thread/INFO]: yluuca issued server command: /spawnerchange cavespider
[19:11:44] [Server thread/ERROR]: null
org.bukkit.command.CommandException: Unhandled exception executing command 'spawnerchange' in plugin Silks v1.1
	at org.bukkit.command.PluginCommand.execute(PluginCommand.java:47) ~[NachoSpigot.jar:git-NachoSpigot-"b49c1a4"]
	at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:150) ~[NachoSpigot.jar:git-NachoSpigot-"b49c1a4"]
	at org.bukkit.craftbukkit.v1_8_R3.CraftServer.dispatchCommand(CraftServer.java:686) ~[NachoSpigot.jar:git-NachoSpigot-"b49c1a4"]
	at net.minecraft.server.v1_8_R3.PlayerConnection.handleCommand(PlayerConnection.java:1362) [NachoSpigot.jar:git-NachoSpigot-"b49c1a4"]
	at net.minecraft.server.v1_8_R3.PlayerConnection.a(PlayerConnection.java:1174) [NachoSpigot.jar:git-NachoSpigot-"b49c1a4"]
	at net.minecraft.server.v1_8_R3.PacketPlayInChat.a(PacketPlayInChat.java:55) [NachoSpigot.jar:git-NachoSpigot-"b49c1a4"]
	at net.minecraft.server.v1_8_R3.PacketPlayInChat.a(PacketPlayInChat.java:5) [NachoSpigot.jar:git-NachoSpigot-"b49c1a4"]
	at net.minecraft.server.v1_8_R3.PlayerConnectionUtils$1.run(SourceFile:13) [NachoSpigot.jar:git-NachoSpigot-"b49c1a4"]
	at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:515) [?:?]
	at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264) [?:?]
	at net.minecraft.server.v1_8_R3.SystemUtils.a(SourceFile:44) [NachoSpigot.jar:git-NachoSpigot-"b49c1a4"]
	at net.minecraft.server.v1_8_R3.MinecraftServer.B(MinecraftServer.java:784) [NachoSpigot.jar:git-NachoSpigot-"b49c1a4"]
	at net.minecraft.server.v1_8_R3.DedicatedServer.B(DedicatedServer.java:406) [NachoSpigot.jar:git-NachoSpigot-"b49c1a4"]
	at net.minecraft.server.v1_8_R3.MinecraftServer.A(MinecraftServer.java:723) [NachoSpigot.jar:git-NachoSpigot-"b49c1a4"]
	at net.minecraft.server.v1_8_R3.MinecraftServer.run(MinecraftServer.java:616) [NachoSpigot.jar:git-NachoSpigot-"b49c1a4"]
	at java.base/java.lang.Thread.run(Thread.java:831) [?:?]
Caused by: java.lang.IllegalArgumentException: No enum constant org.bukkit.entity.EntityType.CAVESPIDER
	at java.base/java.lang.Enum.valueOf(Enum.java:273) ~[?:?]
	at org.bukkit.entity.EntityType.valueOf(EntityType.java:17) ~[NachoSpigot.jar:git-NachoSpigot-"b49c1a4"]
	at com.serbcraft.silks.SpawnerChangeCommand.onCommand(SpawnerChangeCommand.java:44) ~[Silks-1.1.jar:?]
	at org.bukkit.command.PluginCommand.execute(PluginCommand.java:45) ~[NachoSpigot.jar:git-NachoSpigot-"b49c1a4"]
	... 15 more