Bukkit

What steps will reproduce the problem?
1. Trying to create a warp.

What is the expected output? What do you see instead?
I expect a warp to be made. Instead, I see:
[SEVERE] null org.bukkit.command.CommandException: Unhandled exception executing command 'warp' in plugin xWarp v3.1.5 at org.bukkit.command.PluginCommand.execute(PluginCommand.java:42) at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:165) at org.bukkit.craftbukkit.CraftServer.dispatchCommand(CraftServer.java:378) at net.minecraft.server.NetServerHandler.handleCommand(NetServerHandler.java:757) at net.minecraft.server.NetServerHandler.chat(NetServerHandler.java:722) at net.minecraft.server.NetServerHandler.a(NetServerHandler.java:715) at org.getspout.spout.SpoutNetServerHandler.a(SpoutNetServerHandler.java:180) at net.minecraft.server.Packet3Chat.a(Packet3Chat.java:33) at net.minecraft.server.NetworkManager.b(NetworkManager.java:226) at net.minecraft.server.NetServerHandler.a(NetServerHandler.java:93) at org.getspout.spout.SpoutNetServerHandler.a(SpoutNetServerHandler.java:550) at net.minecraft.server.NetworkListenThread.a(SourceFile:108) at net.minecraft.server.MinecraftServer.w(MinecraftServer.java:527) at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:425) at net.minecraft.server.ThreadServerApplication.run(SourceFile:457) Caused by: java.lang.NoClassDefFoundError: com/nijiko/permissions/Entry$EntryVisitor at de.xzise.wrappers.permissions.Permissions3Wrapper.getInteger(Permissions3Wrapper.java:63) at de.xzise.wrappers.permissions.PermissionsHandler.getInteger(PermissionsHandler.java:111) at de.xzise.xwarp.WarpManager.addWarp(WarpManager.java:191) at de.xzise.xwarp.commands.warp.CreateCommand.execute(CreateCommand.java:86) at de.xzise.commands.CommonCommandMap.executeCommand(CommonCommandMap.java:75) at de.xzise.commands.CommonCommandMap.onCommand(CommonCommandMap.java:130) at org.bukkit.command.PluginCommand.execute(PluginCommand.java:40) ... 14 more Caused by: java.lang.ClassNotFoundException: com.nijiko.permissions.Entry$EntryVisitor at java.net.URLClassLoader$1.run(Unknown Source) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(Unknown Source) at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:36) at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:24) at java.lang.ClassLoader.loadClass(Unknown Source) at java.lang.ClassLoader.loadClass(Unknown Source) ... 21 more

What version of the product are you using?
Latest

Do you have an error log of what happened?
See above.

Please provide any additional information below.
/warp works fine, only happens when I try to create a warp.