java.lang.NullPointerException

Please Help My Plugin Gives Error Idk What To Do.

Code:

[03:13:52] [Server thread/ERROR]: null
org.bukkit.command.CommandException: Unhandled exception executing command 'rutbeatla' in plugin CRanks v1.1.0at org.bukkit.command.PluginCommand.execute(PluginCommand.java:46) ~[Skyblock.jar:git-Spigot-21fe707-e1ebe52]at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:141) ~[Skyblock.jar:git-Spigot-21fe707-e1ebe52]at org.bukkit.craftbukkit.v1_8_R3.CraftServer.dispatchCommand(CraftServer.java:641) ~[Skyblock.jar:git-Spigot-21fe707-e1ebe52]at net.minecraft.server.v1_8_R3.PlayerConnection.handleCommand(PlayerConnection.java:1162) [Skyblock.jar:git-Spigot-21fe707-e1ebe52]at net.minecraft.server.v1_8_R3.PlayerConnection.chat(PlayerConnection.java:1078) [Skyblock.jar:git-Spigot-21fe707-e1ebe52]at org.bukkit.craftbukkit.v1_8_R3.entity.CraftPlayer.chat(CraftPlayer.java:237) [Skyblock.jar:git-Spigot-21fe707-e1ebe52]at com.gmail.filoghost.chestcommands.internal.icon.command.PlayerIconCommand.execute(PlayerIconCommand.java:15) [ChestCommands.jar:?]at com.gmail.filoghost.chestcommands.internal.CommandsClickHandler.onClick(CommandsClickHandler.java:34) [ChestCommands.jar:?]at com.gmail.filoghost.chestcommands.api.Icon.onClick(Icon.java:319) [ChestCommands.jar:?]at com.gmail.filoghost.chestcommands.internal.icon.ExtendedIcon.onClick(ExtendedIcon.java:243) [ChestCommands.jar:?]at com.gmail.filoghost.chestcommands.task.ExecuteCommandsTask.run(ExecuteCommandsTask.java:21) [ChestCommands.jar:?]at org.bukkit.craftbukkit.v1_8_R3.scheduler.CraftTask.run(CraftTask.java:71) [Skyblock.jar:git-Spigot-21fe707-e1ebe52]at org.bukkit.craftbukkit.v1_8_R3.scheduler.CraftScheduler.mainThreadHeartbeat(CraftScheduler.java:350) [Skyblock.jar:git-Spigot-21fe707-e1ebe52]at net.minecraft.server.v1_8_R3.MinecraftServer.B(MinecraftServer.java:723) [Skyblock.jar:git-Spigot-21fe707-e1ebe52]at net.minecraft.server.v1_8_R3.DedicatedServer.B(DedicatedServer.java:374) [Skyblock.jar:git-Spigot-21fe707-e1ebe52]at net.minecraft.server.v1_8_R3.MinecraftServer.A(MinecraftServer.java:654) [Skyblock.jar:git-Spigot-21fe707-e1ebe52]at net.minecraft.server.v1_8_R3.MinecraftServer.run(MinecraftServer.java:557) [Skyblock.jar:git-Spigot-21fe707-e1ebe52]at java.lang.Thread.run(Thread.java:748) [?:1.8.0_141]Caused by: java.lang.NullPointerExceptionat com.mhawthor.ranks.CRanks.onCommand(CRanks.java:91) ~[?:?]at org.bukkit.command.PluginCommand.execute(PluginCommand.java:44) ~[Skyblock.jar:git-Spigot-21fe707-e1ebe52]

 

Error:

Plugin:

http://s7./server5/3mzd78/CRanks.rar.html

 

can you teach me how to write java please? i really want to get taught from you

 

well rip.

okay u cant give xd but i really wanna talk with uis it possible?

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