Could not pass event PlayerCommandPreprocessEvent to NetworkBans v1.4.3
org.bukkit.event.EventException: null
        at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:319) ~[server.jar:git-Spigot-37d799b-3eb7236]
        at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:70) ~[server.jar:git-Spigot-37d799b-3eb7236]
        at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:589) ~[server.jar:git-Spigot-37d799b-3eb7236]
        at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:576) ~[server.jar:git-Spigot-37d799b-3eb7236]
        at ch.njol.skript.Skript.dispatchCommand(Skript.java:1384) ~[?:?]
        at ch.njol.skript.effects.EffCommand.execute(EffCommand.java:82) ~[?:?]
        at ch.njol.skript.lang.Effect.run(Effect.java:51) ~[?:?]
        at ch.njol.skript.lang.TriggerItem.walk(TriggerItem.java:60) ~[?:?]
        at ch.njol.skript.lang.TriggerItem.walk(TriggerItem.java:88) ~[?:?]
        at ch.njol.skript.lang.Trigger.execute(Trigger.java:56) ~[?:?]
        at ch.njol.skript.SkriptEventHandler.check(SkriptEventHandler.java:153) ~[?:?]
        at ch.njol.skript.SkriptEventHandler$1.execute(SkriptEventHandler.java:111) ~[?:?]
        at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:70) ~[server.jar:git-Spigot-37d799b-3eb7236]
        at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:589) ~[server.jar:git-Spigot-37d799b-3eb7236]
        at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:576) ~[server.jar:git-Spigot-37d799b-3eb7236]
        at net.minecraft.server.v1_16_R3.PlayerList.attemptLogin(PlayerList.java:547) ~[server.jar:git-Spigot-37d799b-3eb7236]
        at net.minecraft.server.v1_16_R3.LoginListener.c(LoginListener.java:134) ~[server.jar:git-Spigot-37d799b-3eb7236]
        at net.minecraft.server.v1_16_R3.LoginListener.tick(LoginListener.java:53) ~[server.jar:git-Spigot-37d799b-3eb7236]
        at net.minecraft.server.v1_16_R3.NetworkManager.a(NetworkManager.java:219) ~[server.jar:git-Spigot-37d799b-3eb7236]
        at net.minecraft.server.v1_16_R3.ServerConnection.c(ServerConnection.java:130) ~[server.jar:git-Spigot-37d799b-3eb7236]
        at net.minecraft.server.v1_16_R3.MinecraftServer.b(MinecraftServer.java:1126) ~[server.jar:git-Spigot-37d799b-3eb7236]
        at net.minecraft.server.v1_16_R3.DedicatedServer.b(DedicatedServer.java:355) ~[server.jar:git-Spigot-37d799b-3eb7236]
        at net.minecraft.server.v1_16_R3.MinecraftServer.a(MinecraftServer.java:1007) ~[server.jar:git-Spigot-37d799b-3eb7236]
        at net.minecraft.server.v1_16_R3.MinecraftServer.w(MinecraftServer.java:846) ~[server.jar:git-Spigot-37d799b-3eb7236]
        at net.minecraft.server.v1_16_R3.MinecraftServer.lambda$0(MinecraftServer.java:164) ~[server.jar:git-Spigot-37d799b-3eb7236]
        at java.lang.Thread.run(Thread.java:748) [?:1.8.0_282]
Caused by: java.lang.NullPointerException
        at net.rieksen.networkbans.spigot.listener.PlayerListener.onPlayerCommandPreprocess(PlayerListener.java:80) ~[?:?]
        at sun.reflect.GeneratedMethodAccessor120.invoke(Unknown Source) ~[?:?]
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_282]
        at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_282]
        at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:315) ~[server.jar:git-Spigot-37d799b-3eb7236]
        ... 25 more