Problème de console : Serversigns

Bonjour, depuis l'installation hier de : Vault, PluginBaker, Jsonapi et commanddelayer, je ne parviens plus a utiliser le plugin Serversigns

Voici les logs console lorsque je tente de l'utiliser :

[14:58:57 ERROR]: Could not pass event PlayerInteractEvent to ServerSigns v3.1.0
org.bukkit.event.EventException
at org.bukkit.plugin.java.JavaPluginLoader$1.execute( JavaPluginLoader.java:294) ~[craftbukkit_vgbin.jar:git-Bukkit-1.7.9-R0.1-10-g8688bd4-b3092jnks]
at org.bukkit.plugin.RegisteredListener.callEvent(Reg isteredListener.java:62) ~[craftbukkit_vgbin.jar:git-Bukkit-1.7.9-R0.1-10-g8688bd4-b3092jnks]
at org.bukkit.plugin.SimplePluginManager.fireEvent(Si mplePluginManager.java:501) [craftbukkit_vgbin.jar:git-Bukkit-1.7.9-R0.1-10-g8688bd4-b3092jnks]
at org.bukkit.plugin.SimplePluginManager.callEvent(Si mplePluginManager.java:486) [craftbukkit_vgbin.jar:git-Bukkit-1.7.9-R0.1-10-g8688bd4-b3092jnks]
at org.bukkit.craftbukkit.v1_7_R3.event.CraftEventFac tory.callPlayerInteractEvent(CraftEventFactory.jav a:216) [craftbukkit_vgbin.jar:git-Bukkit-1.7.9-R0.1-10-g8688bd4-b3092jnks]
at net.minecraft.server.v1_7_R3.PlayerInteractManager .interact(PlayerInteractManager.java:374) [craftbukkit_vgbin.jar:git-Bukkit-1.7.9-R0.1-10-g8688bd4-b3092jnks]
at net.minecraft.server.v1_7_R3.PlayerConnection.a(Pl ayerConnection.java:629) [craftbukkit_vgbin.jar:git-Bukkit-1.7.9-R0.1-10-g8688bd4-b3092jnks]
at net.minecraft.server.v1_7_R3.PacketPlayInBlockPlac e.a(SourceFile:60) [craftbukkit_vgbin.jar:git-Bukkit-1.7.9-R0.1-10-g8688bd4-b3092jnks]
at net.minecraft.server.v1_7_R3.PacketPlayInBlockPlac e.handle(SourceFile:9) [craftbukkit_vgbin.jar:git-Bukkit-1.7.9-R0.1-10-g8688bd4-b3092jnks]
at net.minecraft.server.v1_7_R3.NetworkManager.a(Netw orkManager.java:157) [craftbukkit_vgbin.jar:git-Bukkit-1.7.9-R0.1-10-g8688bd4-b3092jnks]
at net.minecraft.server.v1_7_R3.ServerConnection.c(So urceFile:134) [craftbukkit_vgbin.jar:git-Bukkit-1.7.9-R0.1-10-g8688bd4-b3092jnks]
at net.minecraft.server.v1_7_R3.MinecraftServer.v(Min ecraftServer.java:667) [craftbukkit_vgbin.jar:git-Bukkit-1.7.9-R0.1-10-g8688bd4-b3092jnks]
at net.minecraft.server.v1_7_R3.DedicatedServer.v(Ded icatedServer.java:260) [craftbukkit_vgbin.jar:git-Bukkit-1.7.9-R0.1-10-g8688bd4-b3092jnks]
at net.minecraft.server.v1_7_R3.MinecraftServer.u(Min ecraftServer.java:558) [craftbukkit_vgbin.jar:git-Bukkit-1.7.9-R0.1-10-g8688bd4-b3092jnks]
at net.minecraft.server.v1_7_R3.MinecraftServer.run(M inecraftServer.java:469) [craftbukkit_vgbin.jar:git-Bukkit-1.7.9-R0.1-10-g8688bd4-b3092jnks]
at net.minecraft.server.v1_7_R3.ThreadServerApplicati on.run(SourceFile:628) [craftbukkit_vgbin.jar:git-Bukkit-1.7.9-R0.1-10-g8688bd4-b3092jnks]
Caused by: java.lang.NoSuchMethodError: ru.tehkode.permissions.PermissionManager.getUser(L java/util/UUID;)Lru/tehkode/permissions/PermissionUser;
at net.milkbowl.vault.permission.plugins.Permission_P ermissionsEx.getUser(Permission_PermissionsEx.java :243) ~[?:?]
at net.milkbowl.vault.permission.plugins.Permission_P ermissionsEx.getPrimaryGroup(Permission_Permission sEx.java:264) ~[?:?]
at net.milkbowl.vault.permission.Permission.getPrimar yGroup(Permission.java:738) ~[?:?]
at de.czymm.serversigns.signs.ServerSignExecutor.form atString(ServerSignExecutor.java:477) ~[?:?]
at de.czymm.serversigns.signs.ServerSignExecutor.exec uteSignFull(ServerSignExecutor.java:198) ~[?:?]
at de.czymm.serversigns.Listeners.PlayerListener.play erInteractCheck(PlayerListener.java:63) ~[?:?]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Nativ e Method) ~[?:1.7.0_03]
at sun.reflect.NativeMethodAccessorImpl.invoke(Native MethodAccessorImpl.java:57) ~[?:1.7.0_03]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(De legatingMethodAccessorImpl.java:43) ~[?:1.7.0_03]
at java.lang.reflect.Method.invoke(Method.java:601) ~[?:1.7.0_03]
at org.bukkit.plugin.java.JavaPluginLoader$1.execute( JavaPluginLoader.java:292) ~[craftbukkit_vgbin.jar:git-Bukkit-1.7.9-R0.1-10-g8688bd4-b3092jnks]
... 15 more
Pourriez-vous m'aider svp ?