[19:03:30] [Server thread/ERROR]: null
org.bukkit.command.CommandException: Unhandled exception executing command 'mod' in plugin qStaff-1.0 v1.0
	at org.bukkit.command.PluginCommand.execute(PluginCommand.java:46) ~[PaperSpigot-1.7.10-R0.1-SNAPSHOT-latest.jar:git-PaperSpigot-1f7d532]
	at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:181) ~[PaperSpigot-1.7.10-R0.1-SNAPSHOT-latest.jar:git-PaperSpigot-1f7d532]
	at org.bukkit.craftbukkit.v1_7_R4.CraftServer.dispatchCommand(CraftServer.java:765) ~[PaperSpigot-1.7.10-R0.1-SNAPSHOT-latest.jar:git-PaperSpigot-1f7d532]
	at net.minecraft.server.v1_7_R4.PlayerConnection.handleCommand(PlayerConnection.java:1047) [PaperSpigot-1.7.10-R0.1-SNAPSHOT-latest.jar:git-PaperSpigot-1f7d532]
	at net.minecraft.server.v1_7_R4.PlayerConnection.a(PlayerConnection.java:884) [PaperSpigot-1.7.10-R0.1-SNAPSHOT-latest.jar:git-PaperSpigot-1f7d532]
	at net.minecraft.server.v1_7_R4.PacketPlayInChat.a(PacketPlayInChat.java:28) [PaperSpigot-1.7.10-R0.1-SNAPSHOT-latest.jar:git-PaperSpigot-1f7d532]
	at net.minecraft.server.v1_7_R4.PacketPlayInChat.handle(PacketPlayInChat.java:65) [PaperSpigot-1.7.10-R0.1-SNAPSHOT-latest.jar:git-PaperSpigot-1f7d532]
	at net.minecraft.server.v1_7_R4.NetworkManager.a(NetworkManager.java:189) [PaperSpigot-1.7.10-R0.1-SNAPSHOT-latest.jar:git-PaperSpigot-1f7d532]
	at net.minecraft.server.v1_7_R4.ServerConnection.c(ServerConnection.java:81) [PaperSpigot-1.7.10-R0.1-SNAPSHOT-latest.jar:git-PaperSpigot-1f7d532]
	at net.minecraft.server.v1_7_R4.MinecraftServer.v(MinecraftServer.java:795) [PaperSpigot-1.7.10-R0.1-SNAPSHOT-latest.jar:git-PaperSpigot-1f7d532]
	at net.minecraft.server.v1_7_R4.DedicatedServer.v(DedicatedServer.java:307) [PaperSpigot-1.7.10-R0.1-SNAPSHOT-latest.jar:git-PaperSpigot-1f7d532]
	at net.minecraft.server.v1_7_R4.MinecraftServer.u(MinecraftServer.java:643) [PaperSpigot-1.7.10-R0.1-SNAPSHOT-latest.jar:git-PaperSpigot-1f7d532]
	at net.minecraft.server.v1_7_R4.MinecraftServer.run(MinecraftServer.java:549) [PaperSpigot-1.7.10-R0.1-SNAPSHOT-latest.jar:git-PaperSpigot-1f7d532]
	at net.minecraft.server.v1_7_R4.ThreadServerApplication.run(SourceFile:628) [PaperSpigot-1.7.10-R0.1-SNAPSHOT-latest.jar:git-PaperSpigot-1f7d532]
Caused by: java.lang.NullPointerException
	at fr.patatedouce.staffmode.mod.onCommand(mod.java:28) ~[?:?]
	at org.bukkit.command.PluginCommand.execute(PluginCommand.java:44) ~[PaperSpigot-1.7.10-R0.1-SNAPSHOT-latest.jar:git-PaperSpigot-1f7d532]
	... 13 more
[19:03:31] [Server thread/INFO]: _PatateDouce issued server command: /pl
[19:03:32] [Server thread/INFO]: _PatateDouce issued server command: /ver
[19:03:34] [Server thread/INFO]: _PatateDouce issued server command: /ver qStaff-1.0