[11:46:03 ERROR]: Could not pass event PlayerChangedWorldEvent to MultiInv v3.3.6
java.lang.NoClassDefFoundError: net/minecraft/server/v1_9_R1/NBTBase
        at uk.co.tggl.pluckerpluck.multiinv.inventory.MIItemStack.<init>(MIItemStack.java:67) ~[?:?]
        at uk.co.tggl.pluckerpluck.multiinv.inventory.MIInventory.<init>(MIInventory.java:34) ~[?:?]
        at uk.co.tggl.pluckerpluck.multiinv.player.MIPlayer.saveAll(MIPlayer.java:119) ~[?:?]
        at uk.co.tggl.pluckerpluck.multiinv.listener.MIPlayerListener.savePlayerState(MIPlayerListener.java:507) ~[?:?]
        at uk.co.tggl.pluckerpluck.multiinv.listener.MIPlayerListener.onPlayerChangedWorld(MIPlayerListener.java:356) ~[?:?]
        at com.destroystokyo.paper.event.executor.asm.generated.GeneratedEventExecutor3055.execute(Unknown Source) ~[?:?]
        at org.bukkit.plugin.EventExecutor$1.execute(EventExecutor.java:44) ~[patched_1.9.4.jar:git-Paper-741]
        at co.aikar.timings.TimedEventExecutor.execute(TimedEventExecutor.java:78) ~[patched_1.9.4.jar:git-Paper-741]
        at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62) ~[patched_1.9.4.jar:git-Paper-741]
        at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:517) [patched_1.9.4.jar:git-Paper-741]
        at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:502) [patched_1.9.4.jar:git-Paper-741]
        at net.minecraft.server.v1_9_R2.PlayerList.moveToWorld(PlayerList.java:701) [patched_1.9.4.jar:git-Paper-741]
        at org.bukkit.craftbukkit.v1_9_R2.entity.CraftPlayer.teleport(CraftPlayer.java:565) [patched_1.9.4.jar:git-Paper-741]
        at org.bukkit.craftbukkit.v1_9_R2.entity.CraftEntity.teleport(CraftEntity.java:231) [patched_1.9.4.jar:git-Paper-741]
        at io.github.dommihd.warpplugin.WarpPlugin.onCommand(WarpPlugin.java:287) [Warps.jar:?]
        at org.bukkit.command.PluginCommand.execute(PluginCommand.java:45) [patched_1.9.4.jar:git-Paper-741]
        at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:152) [patched_1.9.4.jar:git-Paper-741]
        at org.bukkit.craftbukkit.v1_9_R2.CraftServer.dispatchCommand(CraftServer.java:664) [patched_1.9.4.jar:git-Paper-741]
        at net.minecraft.server.v1_9_R2.PlayerConnection.handleCommand(PlayerConnection.java:1387) [patched_1.9.4.jar:git-Paper-741]
        at net.minecraft.server.v1_9_R2.PlayerConnection.a(PlayerConnection.java:1192) [patched_1.9.4.jar:git-Paper-741]
        at net.minecraft.server.v1_9_R2.PacketPlayInChat.a(PacketPlayInChat.java:45) [patched_1.9.4.jar:git-Paper-741]
        at net.minecraft.server.v1_9_R2.PacketPlayInChat.a(PacketPlayInChat.java:5) [patched_1.9.4.jar:git-Paper-741]
        at net.minecraft.server.v1_9_R2.PlayerConnectionUtils$1.run(SourceFile:13) [patched_1.9.4.jar:git-Paper-741]
        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) [?:1.8.0_77]
        at java.util.concurrent.FutureTask.run(FutureTask.java:266) [?:1.8.0_77]
        at net.minecraft.server.v1_9_R2.SystemUtils.a(SourceFile:45) [patched_1.9.4.jar:git-Paper-741]
        at net.minecraft.server.v1_9_R2.MinecraftServer.D(MinecraftServer.java:818) [patched_1.9.4.jar:git-Paper-741]
        at net.minecraft.server.v1_9_R2.DedicatedServer.D(DedicatedServer.java:403) [patched_1.9.4.jar:git-Paper-741]
        at net.minecraft.server.v1_9_R2.MinecraftServer.C(MinecraftServer.java:728) [patched_1.9.4.jar:git-Paper-741]
        at net.minecraft.server.v1_9_R2.MinecraftServer.run(MinecraftServer.java:627) [patched_1.9.4.jar:git-Paper-741]
        at java.lang.Thread.run(Thread.java:745) [?:1.8.0_77]
Caused by: java.lang.ClassNotFoundException: net.minecraft.server.v1_9_R1.NBTBase
        at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:92) ~[patched_1.9.4.jar:git-Paper-741]
        at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:87) ~[patched_1.9.4.jar:git-Paper-741]
        at java.lang.ClassLoader.loadClass(ClassLoader.java:424) ~[?:1.8.0_77]
        at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ~[?:1.8.0_77]
        ... 31 more