08:36:47 [SEVERE] Could not pass event PlayerInteractEvent to SignShop v2.5.2
org.bukkit.event.EventException
	at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:427)
	at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62)
	at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:477)
	at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:462)
	at org.bukkit.craftbukkit.v1_4_R1.event.CraftEventFactory.callPlayerInteractEvent(CraftEventFactory.java:178)
	at net.minecraft.server.v1_4_R1.PlayerInteractManager.dig(PlayerInteractManager.java:114)
	at net.minecraft.server.v1_4_R1.PlayerConnection.a(PlayerConnection.java:564)
	at net.minecraft.server.v1_4_R1.Packet14BlockDig.handle(SourceFile:46)
	at net.minecraft.server.v1_4_R1.NetworkManager.b(NetworkManager.java:290)
	at net.minecraft.server.v1_4_R1.PlayerConnection.d(PlayerConnection.java:113)
	at net.minecraft.server.v1_4_R1.ServerConnection.b(SourceFile:39)
	at net.minecraft.server.v1_4_R1.DedicatedServerConnection.b(SourceFile:30)
	at net.minecraft.server.v1_4_R1.MinecraftServer.r(MinecraftServer.java:598)
	at net.minecraft.server.v1_4_R1.DedicatedServer.r(DedicatedServer.java:224)
	at net.minecraft.server.v1_4_R1.MinecraftServer.q(MinecraftServer.java:494)
	at net.minecraft.server.v1_4_R1.MinecraftServer.run(MinecraftServer.java:427)
	at net.minecraft.server.v1_4_R1.ThreadServerApplication.run(SourceFile:849)
Caused by: java.lang.NoClassDefFoundError: de/bananaco/bpermissions/api/CalculableType
	at net.milkbowl.vault.permission.plugins.Permission_bPermissions2.playerHas(Permission_bPermissions2.java:119)
	at net.milkbowl.vault.permission.Permission.playerHas(Permission.java:138)
	at org.wargamer2010.signshop.player.SignShopPlayer.isOp(SignShopPlayer.java:97)
	at org.wargamer2010.signshop.player.SignShopPlayer.isOp(SignShopPlayer.java:90)
	at org.wargamer2010.signshop.player.SignShopPlayer.isOp(SignShopPlayer.java:85)
	at org.wargamer2010.signshop.util.signshopUtil.clickedSignShopMat(signshopUtil.java:386)
	at org.wargamer2010.signshop.util.signshopUtil.registerClickedMaterial(signshopUtil.java:404)
	at org.wargamer2010.signshop.util.signshopUtil.registerClickedMaterial(signshopUtil.java:397)
	at org.wargamer2010.signshop.listeners.SignShopPlayerListener.onPlayerInteract(SignShopPlayerListener.java:185)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:601)
	at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:425)
	... 16 more