PLEASE HELP

[19:13:36 ERROR]: Could not pass event CurrencyAmountEvent to ChestShop v3.7.9
org.bukkit.event.EventException
        at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.ja
va:294) ~[craftbukkit.jar:git-Bukkit-1.7.2-R0.3-15-g3762cc2-b3043jnks]
        at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.jav
a:62) ~[craftbukkit.jar:git-Bukkit-1.7.2-R0.3-15-g3762cc2-b3043jnks]
        at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.j
ava:501) [craftbukkit.jar:git-Bukkit-1.7.2-R0.3-15-g3762cc2-b3043jnks]
        at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.j
ava:486) [craftbukkit.jar:git-Bukkit-1.7.2-R0.3-15-g3762cc2-b3043jnks]
        at com.Acrobot.ChestShop.ChestShop.callEvent(ChestShop.java:380) [ChestS
hop%20(2).jar:?]
        at com.Acrobot.ChestShop.Listeners.PreTransaction.PartialTransactionModu
le.onPreSellTransaction(PartialTransactionModule.java:103) [ChestShop%20(2).jar:
?]
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0
_05]
        at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0
_05]
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1
.8.0_05]
        at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.8.0_05]
        at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.ja
va:292) [craftbukkit.jar:git-Bukkit-1.7.2-R0.3-15-g3762cc2-b3043jnks]
        at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.jav
a:62) [craftbukkit.jar:git-Bukkit-1.7.2-R0.3-15-g3762cc2-b3043jnks]
        at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.j
ava:501) [craftbukkit.jar:git-Bukkit-1.7.2-R0.3-15-g3762cc2-b3043jnks]
        at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.j
ava:486) [craftbukkit.jar:git-Bukkit-1.7.2-R0.3-15-g3762cc2-b3043jnks]
        at com.Acrobot.ChestShop.Listeners.Player.PlayerInteract.onInteract(Play
erInteract.java:102) [ChestShop%20(2).jar:?]
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0
_05]
        at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0
_05]
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1
.8.0_05]
        at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.8.0_05]
        at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.ja
va:292) [craftbukkit.jar:git-Bukkit-1.7.2-R0.3-15-g3762cc2-b3043jnks]
        at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.jav
a:62) [craftbukkit.jar:git-Bukkit-1.7.2-R0.3-15-g3762cc2-b3043jnks]
        at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.j
ava:501) [craftbukkit.jar:git-Bukkit-1.7.2-R0.3-15-g3762cc2-b3043jnks]
        at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.j
ava:486) [craftbukkit.jar:git-Bukkit-1.7.2-R0.3-15-g3762cc2-b3043jnks]
        at org.bukkit.craftbukkit.v1_7_R3.event.CraftEventFactory.callPlayerInte
ractEvent(CraftEventFactory.java:195) [craftbukkit.jar:git-Bukkit-1.7.2-R0.3-15-
g3762cc2-b3043jnks]
        at net.minecraft.server.v1_7_R3.PlayerInteractManager.dig(PlayerInteract
Manager.java:103) [craftbukkit.jar:git-Bukkit-1.7.2-R0.3-15-g3762cc2-b3043jnks]
        at net.minecraft.server.v1_7_R3.PlayerConnection.a(PlayerConnection.java
:536) [craftbukkit.jar:git-Bukkit-1.7.2-R0.3-15-g3762cc2-b3043jnks]
        at net.minecraft.server.v1_7_R3.PacketPlayInBlockDig.a(SourceFile:53) [c
raftbukkit.jar:git-Bukkit-1.7.2-R0.3-15-g3762cc2-b3043jnks]
        at net.minecraft.server.v1_7_R3.PacketPlayInBlockDig.handle(SourceFile:8
) [craftbukkit.jar:git-Bukkit-1.7.2-R0.3-15-g3762cc2-b3043jnks]
        at net.minecraft.server.v1_7_R3.NetworkManager.a(NetworkManager.java:148
) [craftbukkit.jar:git-Bukkit-1.7.2-R0.3-15-g3762cc2-b3043jnks]
        at net.minecraft.server.v1_7_R3.ServerConnection.c(SourceFile:134) [craf
tbukkit.jar:git-Bukkit-1.7.2-R0.3-15-g3762cc2-b3043jnks]
        at net.minecraft.server.v1_7_R3.MinecraftServer.v(MinecraftServer.java:6
67) [craftbukkit.jar:git-Bukkit-1.7.2-R0.3-15-g3762cc2-b3043jnks]
        at net.minecraft.server.v1_7_R3.DedicatedServer.v(DedicatedServer.java:2
60) [craftbukkit.jar:git-Bukkit-1.7.2-R0.3-15-g3762cc2-b3043jnks]
        at net.minecraft.server.v1_7_R3.MinecraftServer.u(MinecraftServer.java:5
58) [craftbukkit.jar:git-Bukkit-1.7.2-R0.3-15-g3762cc2-b3043jnks]
        at net.minecraft.server.v1_7_R3.MinecraftServer.run(MinecraftServer.java
:469) [craftbukkit.jar:git-Bukkit-1.7.2-R0.3-15-g3762cc2-b3043jnks]
        at net.minecraft.server.v1_7_R3.ThreadServerApplication.run(SourceFile:6
28) [craftbukkit.jar:git-Bukkit-1.7.2-R0.3-15-g3762cc2-b3043jnks]
Caused by: java.lang.NullPointerException
        at com.Acrobot.ChestShop.Signs.ChestShopSign.isAdminShop(ChestShopSign.j
ava:39) ~[?:?]
        at com.Acrobot.ChestShop.Listeners.Economy.ServerAccountCorrector.onBala
nceCheck(ServerAccountCorrector.java:98) ~[?:?]
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0
_05]
        at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0
_05]
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1
.8.0_05]
        at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.8.0_05]
        at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.ja
va:292) ~[craftbukkit.jar:git-Bukkit-1.7.2-R0.3-15-g3762cc2-b3043jnks]
        ... 34 more