nucleus error 1

14:20:21] [Server thread/ERROR] [Sponge]: Could not pass ClientConnectionEvent$Disconnect$Impl to Plugin{id=nucleus, name=Nucleus, version=0.15.0-5.0, description=The Ultimate Essentials Plugin., source=D:\For XX\setup\minecraft\Server\testing\Forge2171 PixelmonPlugins\mods\Nucleus-0.15.0-S5-1.10.2-plugin.jar}
java.lang.NullPointerException
        at io.github.nucleuspowered.nucleus.modules.core.listeners.CoreListener.onPlayerQuit(CoreListener.java:71) ~[CoreListener.class:0.15.0-5.0]
        at org.spongepowered.common.event.listener.DisconnectListener_CoreListener_onPlayerQuit216.handle(Unknown Source) ~[?:?]
        at org.spongepowered.common.event.RegisteredListener.handle(RegisteredListener.java:95) ~[RegisteredListener.class:1.10.2-2171-5.1.0-BETA-1973]
        at org.spongepowered.mod.event.SpongeModEventManager.post(SpongeModEventManager.java:301) [SpongeModEventManager.class:1.10.2-2171-5.1.0-BETA-1973]
        at org.spongepowered.mod.event.SpongeModEventManager.post(SpongeModEventManager.java:285) [SpongeModEventManager.class:1.10.2-2171-5.1.0-BETA-1973]
        at org.spongepowered.mod.event.SpongeModEventManager.post(SpongeModEventManager.java:326) [SpongeModEventManager.class:1.10.2-2171-5.1.0-BETA-1973]
        at org.spongepowered.mod.event.SpongeModEventManager.post(SpongeModEventManager.java:314) [SpongeModEventManager.class:1.10.2-2171-5.1.0-BETA-1973]
        at org.spongepowered.common.SpongeImpl.postEvent(SpongeImpl.java:141) [SpongeImpl.class:1.10.2-2171-5.1.0-BETA-1973]
        at net.minecraft.network.NetHandlerPlayServer.redirect$onDisconnectHandler$zha000(NetHandlerPlayServer.java:512) [me.class:?]
        at net.minecraft.network.NetHandlerPlayServer.func_147231_a(NetHandlerPlayServer.java:802) [me.class:?]
        at net.minecraft.network.NetworkManager.func_179293_l(NetworkManager.java:451) [eo.class:?]
        at net.minecraft.network.NetworkSystem.func_151269_c(NetworkSystem.java:213) [md.class:?]
        at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:732) [MinecraftServer.class:?]
        at net.minecraft.server.dedicated.DedicatedServer.func_71190_q(DedicatedServer.java:387) [ld.class:?]
        at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:613) [MinecraftServer.class:?]
        at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:471) [MinecraftServer.class:?]
        at java.lang.Thread.run(Unknown Source) [?:1.8.0_101]