Could not pass event FPlayerLeaveEvent to Factions v1.6.9.5-U0.4.0-b138
org.bukkit.event.EventException
        at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:302) ~[server.jar:git-PaperSpigot-1f7d532]
        at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62) ~[server.jar:git-PaperSpigot-1f7d532]
        at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:509) [server.jar:git-PaperSpigot-1f7d532]
        at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:494) [server.jar:git-PaperSpigot-1f7d532]
        at com.massivecraft.factions.cmd.CmdDisband.perform(CmdDisband.java:62) [Factions-1.6.9.5-U0.4.0.jar:?]
        at com.massivecraft.factions.cmd.FCommand.execute(FCommand.java:70) [Factions-1.6.9.5-U0.4.0.jar:?]
        at com.massivecraft.factions.cmd.FCommand.execute(FCommand.java:56) [Factions-1.6.9.5-U0.4.0.jar:?]
        at com.massivecraft.factions.cmd.FCmdRoot.onCommand(FCmdRoot.java:219) [Factions-1.6.9.5-U0.4.0.jar:?]
        at org.bukkit.command.PluginCommand.execute(PluginCommand.java:44) [server.jar:git-PaperSpigot-1f7d532]
        at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:181) [server.jar:git-PaperSpigot-1f7d532]
        at org.bukkit.craftbukkit.v1_7_R4.CraftServer.dispatchCommand(CraftServer.java:765) [server.jar:git-PaperSpigot-1f7d532]
        at net.minecraft.server.v1_7_R4.PlayerConnection.handleCommand(PlayerConnection.java:1047) [server.jar:git-PaperSpigot-1f7d532]
        at net.minecraft.server.v1_7_R4.PlayerConnection.a(PlayerConnection.java:884) [server.jar:git-PaperSpigot-1f7d532]
        at net.minecraft.server.v1_7_R4.PacketPlayInChat.a(PacketPlayInChat.java:28) [server.jar:git-PaperSpigot-1f7d532]
        at net.minecraft.server.v1_7_R4.PacketPlayInChat.handle(PacketPlayInChat.java:65) [server.jar:git-PaperSpigot-1f7d532]
        at net.minecraft.server.v1_7_R4.NetworkManager.a(NetworkManager.java:189) [server.jar:git-PaperSpigot-1f7d532]
        at net.minecraft.server.v1_7_R4.ServerConnection.c(ServerConnection.java:81) [server.jar:git-PaperSpigot-1f7d532]
        at net.minecraft.server.v1_7_R4.MinecraftServer.v(MinecraftServer.java:795) [server.jar:git-PaperSpigot-1f7d532]
        at net.minecraft.server.v1_7_R4.DedicatedServer.v(DedicatedServer.java:307) [server.jar:git-PaperSpigot-1f7d532]
        at net.minecraft.server.v1_7_R4.MinecraftServer.u(MinecraftServer.java:643) [server.jar:git-PaperSpigot-1f7d532]
        at net.minecraft.server.v1_7_R4.MinecraftServer.run(MinecraftServer.java:549) [server.jar:git-PaperSpigot-1f7d532]
        at net.minecraft.server.v1_7_R4.ThreadServerApplication.run(SourceFile:628) [server.jar:git-PaperSpigot-1f7d532]