Multiverse Error

[22:41:36] [Server thread/ERROR]: Error occurred while enabling Multiverse-Core v2.5-b692 (Is it up to date?)
java.lang.NoClassDefFoundError: net/minecraft/server/v1_8_R1/TileEntity
	at org.tilegames.hexicube.bukkit.isle.ChunkGen.getDefaultPopulators(ChunkGen.java:61) ~[?:?]
	at net.minecraft.server.v1_8_R2.WorldServer.b(WorldServer.java:115) ~[spigot.jar:git-Spigot-2f787bd-501372f]
	at org.bukkit.craftbukkit.v1_8_R2.CraftServer.createWorld(CraftServer.java:893) ~[spigot.jar:git-Spigot-2f787bd-501372f]
	at org.bukkit.Bukkit.createWorld(Bukkit.java:463) ~[spigot.jar:git-Spigot-2f787bd-501372f]
	at org.bukkit.WorldCreator.createWorld(WorldCreator.java:261) ~[spigot.jar:git-Spigot-2f787bd-501372f]
	at com.onarandombox.MultiverseCore.utils.WorldManager.doLoad(WorldManager.java:421) ~[?:?]
	at com.onarandombox.MultiverseCore.utils.WorldManager.doLoad(WorldManager.java:402) ~[?:?]
	at com.onarandombox.MultiverseCore.utils.WorldManager.doLoad(WorldManager.java:377) ~[?:?]
	at com.onarandombox.MultiverseCore.utils.WorldManager.loadWorlds(WorldManager.java:676) ~[?:?]
	at com.onarandombox.MultiverseCore.MultiverseCore.onEnable(MultiverseCore.java:306) ~[?:?]
	at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:321) ~[spigot.jar:git-Spigot-2f787bd-501372f]
	at org.bukkit.plugin.java.JavaPluginLoader.enablePlugin(JavaPluginLoader.java:335) [spigot.jar:git-Spigot-2f787bd-501372f]
	at us.Myles.PWP.TransparentListeners.PerWorldPluginLoader.enablePlugin(PerWorldPluginLoader.java:145) [PerWorldPlugins.jar:?]
	at org.bukkit.plugin.SimplePluginManager.enablePlugin(SimplePluginManager.java:405) [spigot.jar:git-Spigot-2f787bd-501372f]
	at org.bukkit.craftbukkit.v1_8_R2.CraftServer.loadPlugin(CraftServer.java:356) [spigot.jar:git-Spigot-2f787bd-501372f]
	at org.bukkit.craftbukkit.v1_8_R2.CraftServer.enablePlugins(CraftServer.java:316) [spigot.jar:git-Spigot-2f787bd-501372f]
	at net.minecraft.server.v1_8_R2.MinecraftServer.r(MinecraftServer.java:416) [spigot.jar:git-Spigot-2f787bd-501372f]
	at net.minecraft.server.v1_8_R2.MinecraftServer.k(MinecraftServer.java:382) [spigot.jar:git-Spigot-2f787bd-501372f]
	at net.minecraft.server.v1_8_R2.MinecraftServer.a(MinecraftServer.java:337) [spigot.jar:git-Spigot-2f787bd-501372f]
	at net.minecraft.server.v1_8_R2.DedicatedServer.init(DedicatedServer.java:257) [spigot.jar:git-Spigot-2f787bd-501372f]
	at net.minecraft.server.v1_8_R2.MinecraftServer.run(MinecraftServer.java:522) [spigot.jar:git-Spigot-2f787bd-501372f]
	at java.lang.Thread.run(Thread.java:745) [?:1.7.0_76]
Caused by: java.lang.ClassNotFoundException: net.minecraft.server.v1_8_R1.TileEntity
	at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:91) ~[spigot.jar:git-Spigot-2f787bd-501372f]
	at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:86) ~[spigot.jar:git-Spigot-2f787bd-501372f]
	at java.lang.ClassLoader.loadClass(ClassLoader.java:425) ~[?:1.7.0_76]
	at java.lang.ClassLoader.loadClass(ClassLoader.java:358) ~[?:1.7.0_76]
	... 22 more