How can I fix this error?

[XipsAhoy]

[XipsAhoy]

[13:41:53 ERROR]: Error occurred while enabling KoTH v1.5.1 (Is it up to date?) java.lang.NullPointerException at subside.plugins.koth.KothPlugin.trigger(KothPlugin.java:131) ~[?:?] at subside.plugins.koth.KothPlugin.onEnable(KothPlugin.java:116) ~[?:?] at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:321) ~[patched.jar:git-PaperSpigot-"4c7641d"] at org.bukkit.plugin.java.JavaPluginLoader.enablePlugin(JavaPluginLoader.java:332) [patched.jar:git-PaperSpigot-"4c7641d"] at org.bukkit.plugin.SimplePluginManager.enablePlugin(SimplePluginManager.java:407) [patched.jar:git-PaperSpigot-"4c7641d"] at rush.comandos.ComandoSystem.onCommand(ComandoSystem.java:453) [System.jar:?] at org.bukkit.command.PluginCommand.execute(PluginCommand.java:45) [patched.jar:git-PaperSpigot-"4c7641d"] at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:146) [patched.jar:git-PaperSpigot-"4c7641d"] at org.bukkit.craftbukkit.v1_8_R3.CraftServer.dispatchCommand(CraftServer.java:666) [patched.jar:git-PaperSpigot-"4c7641d"] at net.minecraft.server.v1_8_R3.PlayerConnection.handleCommand(PlayerConnection.java:1189) [patched.jar:git-PaperSpigot-"4c7641d"] at net.minecraft.server.v1_8_R3.PlayerConnection.a(PlayerConnection.java:1001) [patched.jar:git-PaperSpigot-"4c7641d"] at net.minecraft.server.v1_8_R3.PacketPlayInChat.a(PacketPlayInChat.java:45) [patched.jar:git-PaperSpigot-"4c7641d"] at net.minecraft.server.v1_8_R3.PacketPlayInChat.a(PacketPlayInChat.java:1) [patched.jar:git-PaperSpigot-"4c7641d"] at net.minecraft.server.v1_8_R3.PlayerConnectionUtils$1.run(SourceFile:13) [patched.jar:git-PaperSpigot-"4c7641d"] at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source) [?:1.8.0_232] at java.util.concurrent.FutureTask.run(Unknown Source) [?:1.8.0_232] at net.minecraft.server.v1_8_R3.SystemUtils.a(SourceFile:44) [patched.jar:git-PaperSpigot-"4c7641d"] at net.minecraft.server.v1_8_R3.MinecraftServer.B(MinecraftServer.java:774) [patched.jar:git-PaperSpigot-"4c7641d"] at net.minecraft.server.v1_8_R3.DedicatedServer.B(DedicatedServer.java:378) [patched.jar:git-PaperSpigot-"4c7641d"] at net.minecraft.server.v1_8_R3.MinecraftServer.A(MinecraftServer.java:713) [patched.jar:git-PaperSpigot-"4c7641d"] at net.minecraft.server.v1_8_R3.MinecraftServer.run(MinecraftServer.java:616) [patched.jar:git-PaperSpigot-"4c7641d"] at java.lang.Thread.run(Unknown Source) [?:1.8.0_232] [13:41:53 INFO]: [KoTH] Disabling KoTH v1.5.1