Multiworld Error

[06:39:13] [Server thread/ERROR]: Could not pass event PlayerPortalEvent to MultiWorld v5.2.8
org.bukkit.event.EventException
	at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:310) ~[spigot-1.10.jar:git-Spigot-078e2f8-7f9fbe5]
	at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62) ~[spigot-1.10.jar:git-Spigot-078e2f8-7f9fbe5]
	at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:502) [spigot-1.10.jar:git-Spigot-078e2f8-7f9fbe5]
	at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:487) [spigot-1.10.jar:git-Spigot-078e2f8-7f9fbe5]
	at net.minecraft.server.v1_10_R1.PlayerList.changeDimension(PlayerList.java:731) [spigot-1.10.jar:git-Spigot-078e2f8-7f9fbe5]
	at net.minecraft.server.v1_10_R1.EntityPlayer.c(EntityPlayer.java:541) [spigot-1.10.jar:git-Spigot-078e2f8-7f9fbe5]
	at net.minecraft.server.v1_10_R1.BlockEnderPortal.a(BlockEnderPortal.java:46) [spigot-1.10.jar:git-Spigot-078e2f8-7f9fbe5]
	at net.minecraft.server.v1_10_R1.Entity.checkBlockCollisions(Entity.java:840) [spigot-1.10.jar:git-Spigot-078e2f8-7f9fbe5]
	at net.minecraft.server.v1_10_R1.Entity.move(Entity.java:477) [spigot-1.10.jar:git-Spigot-078e2f8-7f9fbe5]
	at net.minecraft.server.v1_10_R1.PlayerConnection.a(PlayerConnection.java:544) [spigot-1.10.jar:git-Spigot-078e2f8-7f9fbe5]
	at net.minecraft.server.v1_10_R1.PacketPlayInFlying.a(SourceFile:126) [spigot-1.10.jar:git-Spigot-078e2f8-7f9fbe5]
	at net.minecraft.server.v1_10_R1.PacketPlayInFlying$PacketPlayInPositionLook.a(SourceFile:18) [spigot-1.10.jar:git-Spigot-078e2f8-7f9fbe5]
	at net.minecraft.server.v1_10_R1.PlayerConnectionUtils$1.run(SourceFile:13) [spigot-1.10.jar:git-Spigot-078e2f8-7f9fbe5]
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) [?:1.8.0_74]
	at java.util.concurrent.FutureTask.run(FutureTask.java:266) [?:1.8.0_74]
	at net.minecraft.server.v1_10_R1.SystemUtils.a(SourceFile:45) [spigot-1.10.jar:git-Spigot-078e2f8-7f9fbe5]
	at net.minecraft.server.v1_10_R1.MinecraftServer.D(MinecraftServer.java:732) [spigot-1.10.jar:git-Spigot-078e2f8-7f9fbe5]
	at net.minecraft.server.v1_10_R1.DedicatedServer.D(DedicatedServer.java:400) [spigot-1.10.jar:git-Spigot-078e2f8-7f9fbe5]
	at net.minecraft.server.v1_10_R1.MinecraftServer.C(MinecraftServer.java:668) [spigot-1.10.jar:git-Spigot-078e2f8-7f9fbe5]
	at net.minecraft.server.v1_10_R1.MinecraftServer.run(MinecraftServer.java:567) [spigot-1.10.jar:git-Spigot-078e2f8-7f9fbe5]
	at java.lang.Thread.run(Thread.java:745) [?:1.8.0_74]
Caused by: java.lang.IllegalArgumentException: Cannot use null location!
	at com.google.common.base.Preconditions.checkArgument(Preconditions.java:125) ~[spigot-1.10.jar:git-Spigot-078e2f8-7f9fbe5]
	at org.bukkit.event.player.PlayerMoveEvent.validateLocation(PlayerMoveEvent.java:91) ~[spigot-1.10.jar:git-Spigot-078e2f8-7f9fbe5]
	at org.bukkit.event.player.PlayerMoveEvent.setTo(PlayerMoveEvent.java:86) ~[spigot-1.10.jar:git-Spigot-078e2f8-7f9fbe5]
	at multiworld.addons.NetherPortalHandler.onPlayerPortal(NetherPortalHandler.java:41) ~[?:?]
	at sun.reflect.GeneratedMethodAccessor943.invoke(Unknown Source) ~[?:?]
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_74]
	at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_74]
	at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:306) ~[spigot-1.10.jar:git-Spigot-078e2f8-7f9fbe5]
	... 20 more