server errors

15:28:58 [INFO] Persistence: Create a plugins/Persistence/permissions.yml to use
 internal permissions
15:28:58 [INFO] Saving wand-commands.txt
15:28:58 [SEVERE] java.lang.NoSuchMethodError: com.nijiko.permissions.Permission
Handler.inGroup(Ljava/lang/String;Ljava/lang/String;)Z
15:28:58 [SEVERE]       at com.sk89q.bukkit.migration.NijiPermissionsResolver.in
Group(NijiPermissionsResolver.java:70)
15:28:58 [SEVERE]       at com.sk89q.bukkit.migration.PermissionsResolverManager
.inGroup(PermissionsResolverManager.java:106)
15:28:58 [SEVERE]       at com.sk89q.worldguard.bukkit.WorldGuardPlugin.inGroup(
WorldGuardPlugin.java:219)
15:28:58 [SEVERE]       at com.sk89q.worldguard.bukkit.WorldGuardPlayerListener.
onPlayerJoin(WorldGuardPlayerListener.java:326)
15:28:58 [SEVERE]       at org.bukkit.plugin.java.JavaPluginLoader$1.execute(Jav
aPluginLoader.java:204)
15:28:58 [SEVERE]       at org.bukkit.plugin.RegisteredListener.callEvent(Regist
eredListener.java:59)
15:28:58 [SEVERE]       at org.bukkit.plugin.SimplePluginManager.callEvent(Simpl
ePluginManager.java:255)
15:28:58 [SEVERE]       at net.minecraft.server.ServerConfigurationManager.a(Ser
verConfigurationManager.java:98)
15:28:58 [SEVERE]       at net.minecraft.server.NetLoginHandler.b(NetLoginHandle
r.java:87)
15:28:58 [SEVERE]       at net.minecraft.server.NetLoginHandler.a(NetLoginHandle
r.java:27)
15:28:58 [SEVERE]       at net.minecraft.server.NetworkListenThread.a(SourceFile
:87)
15:28:58 [SEVERE]       at net.minecraft.server.MinecraftServer.h(MinecraftServe
r.java:368)
15:28:58 [SEVERE]       at net.minecraft.server.MinecraftServer.run(MinecraftSer
ver.java:283)
15:28:58 [SEVERE]       at net.minecraft.server.ThreadServerApplication.run(Sour
ceFile:375)
15:28:58 [SEVERE] java.lang.NoSuchMethodError: com.nijiko.permissions.Permission
Handler.inGroup(Ljava/lang/String;Ljava/lang/String;)Z
15:28:58 [SEVERE]       at com.sk89q.bukkit.migration.NijiPermissionsResolver.in
Group(NijiPermissionsResolver.java:70)
15:28:58 [SEVERE]       at com.sk89q.bukkit.migration.PermissionsResolverManager
.inGroup(PermissionsResolverManager.java:106)
15:28:58 [SEVERE]       at com.sk89q.worldguard.bukkit.WorldGuardPlugin.inGroup(
WorldGuardPlugin.java:219)
15:28:58 [SEVERE]       at com.sk89q.worldguard.bukkit.WorldGuardPlayerListener.
onPlayerJoin(WorldGuardPlayerListener.java:330)
15:28:58 [SEVERE]       at org.bukkit.plugin.java.JavaPluginLoader$1.execute(Jav
aPluginLoader.java:204)
15:28:58 [SEVERE]       at org.bukkit.plugin.RegisteredListener.callEvent(Regist
eredListener.java:59)
15:28:58 [SEVERE]       at org.bukkit.plugin.SimplePluginManager.callEvent(Simpl
ePluginManager.java:255)
15:28:58 [SEVERE]       at net.minecraft.server.ServerConfigurationManager.a(Ser
verConfigurationManager.java:98)
15:28:58 [SEVERE]       at net.minecraft.server.NetLoginHandler.b(NetLoginHandle
r.java:87)
15:28:58 [SEVERE]       at net.minecraft.server.NetLoginHandler.a(NetLoginHandle
r.java:27)
15:28:58 [SEVERE]       at net.minecraft.server.NetworkListenThread.a(SourceFile
:87)
15:28:58 [SEVERE]       at net.minecraft.server.MinecraftServer.h(MinecraftServe
r.java:368)
15:28:58 [SEVERE]       at net.minecraft.server.MinecraftServer.run(MinecraftSer
ver.java:283)
15:28:58 [SEVERE]       at net.minecraft.server.ThreadServerApplication.run(Sour
ceFile:375)