[10:13:55] [Server thread/ERROR]: null
org.bukkit.command.CommandException: Unhandled exception executing command 'sentry' in plugin Sentry v1.8.5
	at org.bukkit.command.PluginCommand.execute(PluginCommand.java:46) ~[spigot.jar:git-Spigot-13716d9-0899683]
	at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:141) ~[spigot.jar:git-Spigot-13716d9-0899683]
	at org.bukkit.craftbukkit.v1_8_R1.CraftServer.dispatchCommand(CraftServer.java:645) ~[spigot.jar:git-Spigot-13716d9-0899683]
	at net.minecraft.server.v1_8_R1.PlayerConnection.handleCommand(PlayerConnection.java:1115) [spigot.jar:git-Spigot-13716d9-0899683]
	at net.minecraft.server.v1_8_R1.PlayerConnection.a(PlayerConnection.java:950) [spigot.jar:git-Spigot-13716d9-0899683]
	at net.minecraft.server.v1_8_R1.PacketPlayInChat.a(PacketPlayInChat.java:26) [spigot.jar:git-Spigot-13716d9-0899683]
	at net.minecraft.server.v1_8_R1.PacketPlayInChat.a(PacketPlayInChat.java:53) [spigot.jar:git-Spigot-13716d9-0899683]
	at net.minecraft.server.v1_8_R1.PacketHandleTask.run(SourceFile:13) [spigot.jar:git-Spigot-13716d9-0899683]
	at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source) [?:1.8.0_31]
	at java.util.concurrent.FutureTask.run(Unknown Source) [?:1.8.0_31]
	at net.minecraft.server.v1_8_R1.MinecraftServer.z(MinecraftServer.java:683) [spigot.jar:git-Spigot-13716d9-0899683]
	at net.minecraft.server.v1_8_R1.DedicatedServer.z(DedicatedServer.java:316) [spigot.jar:git-Spigot-13716d9-0899683]
	at net.minecraft.server.v1_8_R1.MinecraftServer.y(MinecraftServer.java:623) [spigot.jar:git-Spigot-13716d9-0899683]
	at net.minecraft.server.v1_8_R1.MinecraftServer.run(MinecraftServer.java:526) [spigot.jar:git-Spigot-13716d9-0899683]
	at java.lang.Thread.run(Unknown Source) [?:1.8.0_31]
Caused by: java.lang.NullPointerException
	at net.aufdemrand.sentry.Sentry.onCommand(Sentry.java:1221) ~[?:?]
	at org.bukkit.command.PluginCommand.execute(PluginCommand.java:44) ~[spigot.jar:git-Spigot-13716d9-0899683]
	... 14 more