Error occurred while enabling Multiverse-Core v4.3.0-b846 (Is it up to date?)
java.lang.NoClassDefFoundError: org/bukkit/entity/Phantom
	at com.onarandombox.MultiverseCore.utils.SimpleWorldPurger.killDecision(SimpleWorldPurger.java:152) ~[?:?]
	at com.onarandombox.MultiverseCore.utils.SimpleWorldPurger.purgeWorld(SimpleWorldPurger.java:119) ~[?:?]
	at com.onarandombox.MultiverseCore.utils.SimpleWorldPurger.purgeWorld(SimpleWorldPurger.java:197) ~[?:?]
	at com.onarandombox.MultiverseCore.utils.SimpleWorldPurger.purgeWorld(SimpleWorldPurger.java:74) ~[?:?]
	at com.onarandombox.MultiverseCore.MVWorld$SpawningPropertyValidator.validateChange(MVWorld.java:286) ~[?:?]
	at com.onarandombox.MultiverseCore.MVWorld$SpawningPropertyValidator.validateChange(MVWorld.java:260) ~[?:?]
	at com.onarandombox.serializationconfig.SerializationConfig.SerializationConfig.validate(SerializationConfig.java:893) ~[?:?]
	at com.onarandombox.serializationconfig.SerializationConfig.SerializationConfig.setPropertyValue(SerializationConfig.java:443) ~[?:?]
	at com.onarandombox.serializationconfig.SerializationConfig.SerializationConfig.setPropertyValue(SerializationConfig.java:368) ~[?:?]
	at com.onarandombox.serializationconfig.SerializationConfig.SerializationConfig.setPropertyValue(SerializationConfig.java:353) ~[?:?]
	at com.onarandombox.serializationconfig.SerializationConfig.SerializationConfig.setPropertyValueUnchecked(SerializationConfig.java:736) ~[?:?]
	at com.onarandombox.MultiverseCore.WorldProperties.setAllowAnimalSpawn(WorldProperties.java:424) ~[?:?]
	at com.onarandombox.MultiverseCore.MVWorld.setAllowAnimalSpawn(MVWorld.java:767) ~[?:?]
	at com.onarandombox.MultiverseCore.MVWorld.validateEntitySpawns(MVWorld.java:195) ~[?:?]
	at com.onarandombox.MultiverseCore.MVWorld.validateProperties(MVWorld.java:205) ~[?:?]
	at com.onarandombox.MultiverseCore.MVWorld.<init>(MVWorld.java:94) ~[?:?]
	at com.onarandombox.MultiverseCore.MVWorld.<init>(MVWorld.java:59) ~[?:?]
	at com.onarandombox.MultiverseCore.utils.WorldManager.doLoad(WorldManager.java:496) ~[?:?]
	at com.onarandombox.MultiverseCore.utils.WorldManager.doLoad(WorldManager.java:467) ~[?:?]
	at com.onarandombox.MultiverseCore.utils.WorldManager.doLoad(WorldManager.java:442) ~[?:?]
	at com.onarandombox.MultiverseCore.utils.WorldManager.loadWorlds(WorldManager.java:770) ~[?:?]
	at com.onarandombox.MultiverseCore.MultiverseCore.onEnable(MultiverseCore.java:313) ~[?:?]
	at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:264) ~[Spigot.jar:git-Spigot-dcd1643-e60fc34]
	at org.bukkit.plugin.java.JavaPluginLoader.enablePlugin(JavaPluginLoader.java:337) [Spigot.jar:git-Spigot-dcd1643-e60fc34]
	at org.bukkit.plugin.SimplePluginManager.enablePlugin(SimplePluginManager.java:403) [Spigot.jar:git-Spigot-dcd1643-e60fc34]
	at org.bukkit.craftbukkit.v1_12_R1.CraftServer.enablePlugin(CraftServer.java:381) [Spigot.jar:git-Spigot-dcd1643-e60fc34]
	at org.bukkit.craftbukkit.v1_12_R1.CraftServer.enablePlugins(CraftServer.java:330) [Spigot.jar:git-Spigot-dcd1643-e60fc34]
	at net.minecraft.server.v1_12_R1.MinecraftServer.t(MinecraftServer.java:422) [Spigot.jar:git-Spigot-dcd1643-e60fc34]
	at net.minecraft.server.v1_12_R1.MinecraftServer.l(MinecraftServer.java:383) [Spigot.jar:git-Spigot-dcd1643-e60fc34]
	at net.minecraft.server.v1_12_R1.MinecraftServer.a(MinecraftServer.java:338) [Spigot.jar:git-Spigot-dcd1643-e60fc34]
	at net.minecraft.server.v1_12_R1.DedicatedServer.init(DedicatedServer.java:272) [Spigot.jar:git-Spigot-dcd1643-e60fc34]
	at net.minecraft.server.v1_12_R1.MinecraftServer.run(MinecraftServer.java:545) [Spigot.jar:git-Spigot-dcd1643-e60fc34]
	at java.lang.Thread.run(Thread.java:834) [?:?]