org.bukkit.command.CommandException: Unhandled exception executing command 'playerranks' in plugin P

org.bukkit.command.CommandException: Unhandled exception executing command 'playerranks' in plugin PlayerRanks v2.1
at org.bukkit.command.PluginCommand.execute(PluginCommand.java:47) ~[craftbukkit-1.15.2.jar:git-Bukkit-a81f6ed]
at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:148) ~[craftbukkit-1.15.2.jar:git-Bukkit-a81f6ed]
at org.bukkit.craftbukkit.v1_15_R1.CraftServer.dispatchCommand(CraftServer.java:690) ~[craftbukkit-1.15.2.jar:git-Bukkit-a81f6ed]
at net.minecraft.server.v1_15_R1.PlayerConnection.handleCommand(PlayerConnection.java:1606) ~[craftbukkit-1.15.2.jar:git-Bukkit-a81f6ed]
at net.minecraft.server.v1_15_R1.PlayerConnection.a(PlayerConnection.java:1460) ~[craftbukkit-1.15.2.jar:git-Bukkit-a81f6ed]
at net.minecraft.server.v1_15_R1.PacketPlayInChat.a(SourceFile:36) ~[craftbukkit-1.15.2.jar:git-Bukkit-a81f6ed]
at net.minecraft.server.v1_15_R1.PacketPlayInChat.a(SourceFile:9) ~[craftbukkit-1.15.2.jar:git-Bukkit-a81f6ed]
at net.minecraft.server.v1_15_R1.PlayerConnectionUtils.lambda$0(PlayerConnectionUtils.java:19) ~[craftbukkit-1.15.2.jar:git-Bukkit-a81f6ed]
at net.minecraft.server.v1_15_R1.TickTask.run(SourceFile:18) [craftbukkit-1.15.2.jar:git-Bukkit-a81f6ed]
at net.minecraft.server.v1_15_R1.IAsyncTaskHandler.executeTask(SourceFile:144) [craftbukkit-1.15.2.jar:git-Bukkit-a81f6ed]
at net.minecraft.server.v1_15_R1.IAsyncTaskHandlerReentrant.executeTask(SourceFile:23) [craftbukkit-1.15.2.jar:git-Bukkit-a81f6ed]
at net.minecraft.server.v1_15_R1.IAsyncTaskHandler.executeNext(SourceFile:118) [craftbukkit-1.15.2.jar:git-Bukkit-a81f6ed]
at net.minecraft.server.v1_15_R1.MinecraftServer.ba(MinecraftServer.java:876) [craftbukkit-1.15.2.jar:git-Bukkit-a81f6ed]
at net.minecraft.server.v1_15_R1.MinecraftServer.executeNext(MinecraftServer.java:869) [craftbukkit-1.15.2.jar:git-Bukkit-a81f6ed]
at net.minecraft.server.v1_15_R1.IAsyncTaskHandler.executeAll(SourceFile:103) [craftbukkit-1.15.2.jar:git-Bukkit-a81f6ed]
at net.minecraft.server.v1_15_R1.MinecraftServer.sleepForTick(MinecraftServer.java:852) [craftbukkit-1.15.2.jar:git-Bukkit-a81f6ed]
at net.minecraft.server.v1_15_R1.MinecraftServer.run(MinecraftServer.java:793) [craftbukkit-1.15.2.jar:git-Bukkit-a81f6ed]
at java.lang.Thread.run(Thread.java:745) [?:1.8.0_72]
Caused by: java.lang.NullPointerException
at de.cyne.playerranks.commands.PlayerRanksCommand.onCommand(PlayerRanksCommand.java:34) ~[?:?]
at org.bukkit.command.PluginCommand.execute(PluginCommand.java:45) ~[craftbukkit-1.15.2.jar:git-Bukkit-a81f6ed]
... 17 more


How to do ?

 

https://pastebin.com/GD2g57pf

and i have this :

[Essentials] Task #5573 for Essentials v2.17.2.0 generated an exception
java.lang.NullPointerException: null
at com.earth2me.essentials.xmpp.XMPPManager.updatePresence(XMPPManager.java:150) ~[?:?]
at com.earth2me.essentials.xmpp.EssentialsXMPP.updatePresence(EssentialsXMPP.java:113) ~[?:?]
at org.bukkit.craftbukkit.v1_15_R1.scheduler.CraftTask.run(CraftTask.java:77) ~[craftbukkit-1.15.2.jar:git-Bukkit-a81f6ed]
at org.bukkit.craftbukkit.v1_15_R1.scheduler.CraftScheduler.mainThreadHeartbeat(CraftScheduler.java:393) [craftbukkit-1.15.2.jar:git-Bukkit-a81f6ed]
at net.minecraft.server.v1_15_R1.MinecraftServer.b(MinecraftServer.java:985) [craftbukkit-1.15.2.jar:git-Bukkit-a81f6ed]
at net.minecraft.server.v1_15_R1.DedicatedServer.b(DedicatedServer.java:386) [craftbukkit-1.15.2.jar:git-Bukkit-a81f6ed]
at net.minecraft.server.v1_15_R1.MinecraftServer.a(MinecraftServer.java:940) [craftbukkit-1.15.2.jar:git-Bukkit-a81f6ed]
at net.minecraft.server.v1_15_R1.MinecraftServer.run(MinecraftServer.java:789) [craftbukkit-1.15.2.jar:git-Bukkit-a81f6ed]
at java.lang.Thread.run(Thread.java:745) [?:1.8.0_72]

When i try to /mute, /ban or /kick my member i cant

look my config please

https://pastebin.com/WM1VCKgk

EDIT by Moderator: merged posts, please use the edit button instead of double posting.

 

@timtower it's okais for u ?