Ships error

[20:38:01 ERROR]: Could not pass event PlayerInteractEvent to Ships v5.0.0.0
org.bukkit.event.EventException
        at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.ja
va:297) ~[craftbukkit.jar:git-Bukkit-3fc97ff]
        at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.jav
a:62) ~[craftbukkit.jar:git-Bukkit-3fc97ff]
        at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.j
ava:501) [craftbukkit.jar:git-Bukkit-3fc97ff]
        at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.j
ava:486) [craftbukkit.jar:git-Bukkit-3fc97ff]
        at org.bukkit.craftbukkit.v1_8_R1.event.CraftEventFactory.callPlayerInte
ractEvent(CraftEventFactory.java:209) [craftbukkit.jar:git-Bukkit-3fc97ff]
        at net.minecraft.server.v1_8_R1.PlayerInteractManager.interact(PlayerInt
eractManager.java:462) [craftbukkit.jar:git-Bukkit-3fc97ff]
        at net.minecraft.server.v1_8_R1.PlayerConnection.a(PlayerConnection.java
:693) [craftbukkit.jar:git-Bukkit-3fc97ff]
        at net.minecraft.server.v1_8_R1.PacketPlayInBlockPlace.a(PacketPlayInBlo
ckPlace.java:50) [craftbukkit.jar:git-Bukkit-3fc97ff]
        at net.minecraft.server.v1_8_R1.PacketPlayInBlockPlace.a(PacketPlayInBlo
ckPlace.java:80) [craftbukkit.jar:git-Bukkit-3fc97ff]
        at net.minecraft.server.v1_8_R1.PacketHandleTask.run(SourceFile:13) [cra
ftbukkit.jar:git-Bukkit-3fc97ff]
        at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source) [
?:1.8.0_40]
        at java.util.concurrent.FutureTask.run(Unknown Source) [?:1.8.0_40]
        at net.minecraft.server.v1_8_R1.MinecraftServer.z(MinecraftServer.java:6
56) [craftbukkit.jar:git-Bukkit-3fc97ff]
        at net.minecraft.server.v1_8_R1.DedicatedServer.z(DedicatedServer.java:2
84) [craftbukkit.jar:git-Bukkit-3fc97ff]
        at net.minecraft.server.v1_8_R1.MinecraftServer.y(MinecraftServer.java:6
09) [craftbukkit.jar:git-Bukkit-3fc97ff]
        at net.minecraft.server.v1_8_R1.MinecraftServer.run(MinecraftServer.java
:517) [craftbukkit.jar:git-Bukkit-3fc97ff]
        at java.lang.Thread.run(Unknown Source) [?:1.8.0_40]
Caused by: java.lang.NullPointerException
        at MoseShips.ShipTypes.VesselType.takeFuel(VesselType.java:133) ~[?:?]
        at MoseShips.ShipTypes.Types.AirShip.CheckRequirements(AirShip.java:94)
~[?:?]
        at MoseShips.StillShip.Vessel.moveVessel(Vessel.java:210) ~[?:?]
        at MoseShips.Listeners.BukkitListeners.signClick(BukkitListeners.java:12
9) ~[?:?]
        at sun.reflect.GeneratedMethodAccessor93.invoke(Unknown Source) ~[?:?]
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1
.8.0_40]
        at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.8.0_40]
        at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.ja
va:295) ~[craftbukkit.jar:git-Bukkit-3fc97ff]
        ... 16 more

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