GriefPrevention 1.13 Works but throws error

[rackgaming]

14:46:11 [ERROR] [Pokkit]: Could not pass event PlayerJoinEvent to GriefPrevention v16.11.6 org.bukkit.event.EventException: null at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:316) ~[Pokkit-0.11.1.jar:0.11.1] at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:66) ~[Pokkit-0.11.1.jar:0.11.1] at nl.rutgerkok.pokkit.plugin.BukkitEventManager.fireEvent(BukkitEventManager.java:64) [Pokkit-0.11.1.jar:0.11.1] at nl.rutgerkok.pokkit.plugin.BukkitEventManager.callEvent(BukkitEventManager.java:49) [Pokkit-0.11.1.jar:0.11.1] at nl.rutgerkok.pokkit.plugin.PokkitPluginManager.callEvent(PokkitPluginManager.java:79) [Pokkit-0.11.1.jar:0.11.1] at nl.rutgerkok.pokkit.pluginservice.EventTranslator.callUncancellable(EventTranslator.java:41) [Pokkit-0.11.1.jar:0.11.1] at nl.rutgerkok.pokkit.pluginservice.PlayerConnectEvents.onPlayerJoin(PlayerConnectEvents.java:29) [Pokkit-0.11.1.jar:0.11.1] at cn.nukkit.plugin.PNXMethodEventExecutor$63.execute(EventHandler@nl.rutgerkok.pokkit.pluginservice.PlayerConnectEvents#onPlayerJoin) [?:?] at cn.nukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:61) [PowerNukkitX-master-502a5def0.jar:?] at cn.nukkit.plugin.PluginManager.callEvent(PluginManager.java:581) [PowerNukkitX-master-502a5def0.jar:?] at cn.nukkit.Player.doFirstSpawn(Player.java:723) [PowerNukkitX-master-502a5def0.jar:?] at cn.nukkit.Player.sendNextChunk(Player.java:664) [PowerNukkitX-master-502a5def0.jar:?] at cn.nukkit.Player.checkNetwork(Player.java:3178) [PowerNukkitX-master-502a5def0.jar:?] at cn.nukkit.Server.tick(Server.java:1549) [PowerNukkitX-master-502a5def0.jar:?] at cn.nukkit.Server.tickProcessor(Server.java:1314) [PowerNukkitX-master-502a5def0.jar:?] at cn.nukkit.Server.start(Server.java:1274) [PowerNukkitX-master-502a5def0.jar:?] at cn.nukkit.Server.<init>(Server.java:920) [PowerNukkitX-master-502a5def0.jar:?] at cn.nukkit.Nukkit.main(Nukkit.java:160) [PowerNukkitX-master-502a5def0.jar:?] Caused by: java.lang.UnsupportedOperationException: This method is not supported yet by Pokkit 0.11.1 at nl.rutgerkok.pokkit.Pokkit.unsupported(Pokkit.java:71) ~[Pokkit-0.11.1.jar:0.11.1] at nl.rutgerkok.pokkit.player.PokkitPlayer.getStatistic(PokkitPlayer.java:604) ~[Pokkit-0.11.1.jar:0.11.1] at me.ryanhamshire.GriefPrevention.GriefPrevention.isNewToServer(GriefPrevention.java:3630) ~[?:?] at me.ryanhamshire.GriefPrevention.PlayerEventHandler.onPlayerJoin(PlayerEventHandler.java:678) ~[?:?] at jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:?] at jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77) ~[?:?] at jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:?] at java.lang.reflect.Method.invoke(Method.java:568) ~[?:?] at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:312) ~[Pokkit-0.11.1.jar:0.11.1]