org.bukkit.command.CommandException: Unhandled exception executing command 'f' in plugin Factions v1.6.9.5-U0.1.19-SNAPSHOT

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Unhandled exception executing command 'f' in plugin Factions v1.6.9.5-U0.1.19-SNAPSHOT
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Unhandled exception executing command 'ahelp' in plugin AdminHelp v0.2
java.lang.NullPointerException:
at org.appledash.saneeconomy.economy.backend.type.EconomyStorageBackendFlatfile.accountExists(EconomyStorageBackendFlatfile.java:75)
at org.appledash.saneeconomy.economy.EconomyManager.accountExists(EconomyManager.java:51)
at org.appledash.saneeconomy.vault.EconomySaneEconomy.hasAccount(EconomySaneEconomy.java:54)
at com.massivecraft.factions.integration.Econ.hasAccount(Econ.java:383)
at com.massivecraft.factions.zcore.persist.MemoryFaction.getAccountId(MemoryFaction.java:236)
at com.massivecraft.factions.zcore.persist.MemoryFPlayer.leave(MemoryFPlayer.java:647)
at com.massivecraft.factions.cmd.CmdLeave.perform(CmdLeave.java:26)
at com.massivecraft.factions.zcore.MCommand.execute(MCommand.java:130)
at com.massivecraft.factions.cmd.FCommand.execute(FCommand.java:53)
at com.massivecraft.factions.zcore.MCommand.execute(MCommand.java:116)
at com.massivecraft.factions.cmd.FCommand.execute(FCommand.java:53)
at com.massivecraft.factions.zcore.MCommand.execute(MCommand.java:134)
at com.massivecraft.factions.zcore.MPlugin.handleCommand(MPlugin.java:299)
at com.massivecraft.factions.zcore.MPlugin.handleCommand(MPlugin.java:262)
at com.massivecraft.factions.P.handleCommand(P.java:180)
at com.massivecraft.factions.P.onCommand(P.java:191)
at org.bukkit.command.PluginCommand.execute(PluginCommand.java:44)
at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:141)
at org.bukkit.craftbukkit.v1_9_R2.CraftServer.dispatchCommand(CraftServer.java:646)
at net.minecraft.server.v1_9_R2.PlayerConnection.handleCommand(PlayerConnection.java:1349)
at net.minecraft.server.v1_9_R2.PlayerConnection.a(PlayerConnection.java:1184)
at net.minecraft.server.v1_9_R2.PacketPlayInChat.a(PacketPlayInChat.java:45)
at net.minecraft.server.v1_9_R2.PacketPlayInChat.a(PacketPlayInChat.java:1)
at net.minecraft.server.v1_9_R2.PlayerConnectionUtils$1.run(SourceFile:13)
at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
at net.minecraft.server.v1_9_R2.SystemUtils.a(SourceFile:45)
at net.minecraft.server.v1_9_R2.MinecraftServer.D(MinecraftServer.java:726)
at net.minecraft.server.v1_9_R2.DedicatedServer.D(DedicatedServer.java:399)
at net.minecraft.server.v1_9_R2.MinecraftServer.C(MinecraftServer.java:665)
at net.minecraft.server.v1_9_R2.MinecraftServer.run(MinecraftServer.java:564)
at java.lang.Thread.run(Unknown Source)

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