Passing PlayerTeleportEvent to PreciousStones?

No startup errors, but when someone tries to enter an Entry Bouncer, this happens:

Code:

23:05:16 [SEVERE] Could not pass event PlayerTeleportEvent to PreciousStones v9.5.2
org.bukkit.event.EventException
    at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:341)
    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.entity.CraftPlayer.teleport(CraftPlayer.java:364)
    at com.earth2me.essentials.Teleport.now(Teleport.java:234)
    at com.earth2me.essentials.Teleport.teleport(Teleport.java:267)
    at com.earth2me.essentials.Teleport.teleport(Teleport.java:252)
    at com.earth2me.essentials.commands.Commandtp.run(Commandtp.java:41)
    at com.earth2me.essentials.commands.EssentialsCommand.run(EssentialsCommand.java:96)
    at com.earth2me.essentials.Essentials.onCommandEssentials(Essentials.java:380)
    at com.earth2me.essentials.Essentials.onCommand(Essentials.java:299)
    at org.bukkit.command.PluginCommand.execute(PluginCommand.java:44)
    at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:186)
    at org.bukkit.craftbukkit.CraftServer.dispatchCommand(CraftServer.java:502)
    at net.minecraft.server.NetServerHandler.handleCommand(NetServerHandler.java:985)
    at net.minecraft.server.NetServerHandler.chat(NetServerHandler.java:903)
    at net.minecraft.server.NetServerHandler.a(NetServerHandler.java:858)
    at net.minecraft.server.Packet3Chat.handle(Packet3Chat.java:44)
    at net.minecraft.server.NetworkManager.b(NetworkManager.java:290)
    at net.minecraft.server.NetServerHandler.d(NetServerHandler.java:113)
    at net.minecraft.server.ServerConnection.b(SourceFile:39)
    at net.minecraft.server.DedicatedServerConnection.b(SourceFile:30)
    at net.minecraft.server.MinecraftServer.r(MinecraftServer.java:595)
    at net.minecraft.server.DedicatedServer.r(DedicatedServer.java:222)
    at net.minecraft.server.MinecraftServer.q(MinecraftServer.java:493)
    at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:426)
    at net.minecraft.server.ThreadServerApplication.run(SourceFile:856)
Caused by: java.lang.NullPointerException
    at net.sacredlabyrinth.Phaed.PreciousStones.managers.PlayerManager.getOutsideFieldLocation(PlayerManager.java:125)
    at net.sacredlabyrinth.Phaed.PreciousStones.listeners.PSPlayerListener.onPlayerTeleport(PSPlayerListener.java:313)
    at sun.reflect.GeneratedMethodAccessor177.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:597)
    at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:339)
    ... 27 more

How do I fix this?

 

Pass the error onto the developer of the plugin and see if he/she knows how to fix it? That would be the most reliable source since that person made the plugin.