Permissions Ex Start-up error

groups:
default:
default: true
permissions:
- essentials.gc
- essentials.add
- enderchestplus.use
- essentials.delhome
- essentials.signs.use.sell
- essentials.signs.use.buy
- -bukkit.command.kill
- essentials.realname
- essentials.chat.shout
- essentials.seen
- bukkit.broadcast.user
- essentials.help
- essentials.helpop
- essentials.list
- essentials.motd
- essentials.rules
- essentials.spawn
- essentials.balance
- essentials.balance.others
- essentials.balancetop
- essentials.help
- essentials.helpop
- essentials.home
- essentials.ignore
- essentials.info
- essentials.kit
- essentials.list
- essentials.motd
- essentials.msg
- essentials.pay
- essentials.ping
- essentials.rules
- essentials.sethome
- essentials.signs.use.kit
- essentials.signs.use.warp
- essentials.suicide
- essentials.tpa
- essentials.tpaccept
- essentials.tpahere
- essentials.tpdeny
- essentials.warp
- essentials.warp.list
options:
build: true
prefix: '&7'
Helper:
permissions:
- essentials.helpop.receive
- essentials.kick
- essentials.mute
options:
build: true
inheritance:
- default
prefix: '&9[Helper]&f '
Moderator:
permissions:
- essentials.afk.kickexempt
- essentials.ban
- essentials.ban.notify
- essentials.banip
- essentials.broadcast
- essentials.chat.url
- essentials.chat.magic
- essentials.clearinventory
- essentials.fly
- essentials.fly.safelogin
- essentials.getpos
- essentials.getpos.others
- essentials.helpop.receive
- essentials.home.others
- essentials.invsee
- essentials.kick
- essentials.kick.notify
- essentials.kill
- essentials.kits.*
- essentials.msg.magic
- essentials.mute
- essentials.mute.notify
- essentials.nick.color
- essentials.nick.others
- essentials.realname
- essentials.seen
- essentials.seen.banreason
- essentials.seen.extra
- essentials.time
- essentials.time.set
- essentials.top
- essentials.tp
- essentials.tp.others
- essentials.tphere
- essentials.tppos
- essentials.tptoggle
- essentials.unban
- essentials.unbanip
- essentials.vanish
- essentials.vanish.effect
- essentials.warps.*
- essentials.weather
- essentials.whois
- essentials.workbench
- essentials.chat.shout
- essentials.gamemode
- essentials.sethome.multiple.unlimited
- factions.*
inheritance:
- Helper
prefix: '&b[Mod]&f '
Admin:
permissions:
- '*'
prefix: '&4'
HugZModerator:
permissions:
- bukkit.command.ban
- bukkit.command.ban.ip
- bukkit.command.ban.player
- bukkit.command.gamemode
- bukkit.command.kick
- bukkit.command.unban
- bukkit.command.unban.ip
- bukkit.command.unban.player
- bukkit.broadcast
- bukkit.broadcast.admin
- bukkit.command.give
- bukkit.command.help
- bukkit.command.kill
- bukkit.command.list
- bukkit.command.me
- bukkit.command.say
- bukkit.command.plugins
- bukkit.command.teleport
- bukkit.command.tell
- bukkit.command.time
- bukkit.command.time.add
- bukkit.command.time.set
- essentials.*
- vanish.*
inheritance:
- Moderator
prefix: '&bMod+&f '
Donator:
permissions:
- essentials.kit.donator
- essentials.hat
- essentials.warps.vip
inheritance:
- defualt
prefix: '&f[&3Donator&f]'
Supporter:
permissions:
- essentials.kit.supporter
- essentials.hat
- essentials.ext
- arrowsplus.firework.red
- arrowsplus.firework.blue
- arrowsplus.firework.green
inheritance:
- Donator
prefix: '&f[&eSupporter&f] '
VIP:
permissions:
- essentials.kit.vip
- essentials.sethome
- essentials.sethome.multiple.vip
- essentials.delhome
- tpnametags.color.aqua
- arrowsplus.firework.aqua
- arrowsplus.firework.pink
- arrowsplus.firework.white
inheritance:
- Supporter
prefix: '&f[&bVIP&f] '
Elite:
permissions:
- essentials.kit.elite
- essentials.sethome.multiple.elite
- essentials.heal
- tpnametags.color.red
- arrowsplus.firework.black
- arrowsplus.firework.yellow
inheritance:
- VIP
prefix: '&f[&cElite&f]&e '
Hero:
permissions:
- essentials.sethome.multiple.hero
- tpnametags.color.gold
- essentials.back
- essentials.heal.others
- essentials.kit.hero
inheritance:
- Elite
prefix: '&f[&6Hero&f] '
Designer:
permissions:
- essentials.kit.designer
- essentials.sethome.multiple.designer
- essentials.signs.color
- tpnametags.color.purple
inheritance:
- Hero
prefix: '&f[&5Designer&f] '
Legend:
permissions:
- essentials.sethome.multiple.legend
- essentials.feed
- essentials.kit.legend
- tpnametags.color.blue
inheritance:
- Designer
prefix: '&f[&9Legend&f] '
Titan:
permissions:
- essentials.sethome.multiple.titan
- essentials.kit.titan
- tpnametags.color.dark_aqua
- essentials.fireball
inheritance:
- Legend
prefix: '&f[&3Titan&f] '
GOD:
permissions:
- tpnametags.format.bold
- essentials.sethome.multiple.god
- essentials.kit.god
- tpnametags.color.green
inheritance:
- Titan
prefix: '&f[&aGOD&f] '
Trusted:
inheritance:
- default
prefix: '&a[Trusted]&f '
permissions:
- enderchestplus.use
- essentials.hat

Full error:
20.08 12:00:04 [Server] INFO at net.minecraft.server.v1_6_R2.ThreadServerApplication.run(SourceFile:582)
20.08 12:00:04 [Server] INFO at net.minecraft.server.v1_6_R2.MinecraftServer.run(MinecraftServer.java:419)
20.08 12:00:04 [Server] INFO at net.minecraft.server.v1_6_R2.MinecraftServer.s(MinecraftServer.java:486)
20.08 12:00:04 [Server] INFO at net.minecraft.server.v1_6_R2.DedicatedServer.t(DedicatedServer.java:226)
20.08 12:00:04 [Server] INFO at net.minecraft.server.v1_6_R2.MinecraftServer.t(MinecraftServer.java:590)
20.08 12:00:04 [Server] INFO at net.minecraft.server.v1_6_R2.DedicatedServerConnection.b(SourceFile:30)
20.08 12:00:04 [Server] INFO at net.minecraft.server.v1_6_R2.ServerConnection.b(SourceFile:37)
20.08 12:00:04 [Server] INFO at net.minecraft.server.v1_6_R2.PlayerConnection.e(PlayerConnection.java:118)
20.08 12:00:04 [Server] INFO at net.minecraft.server.v1_6_R2.NetworkManager.b(NetworkManager.java:296)
20.08 12:00:04 [Server] INFO at net.minecraft.server.v1_6_R2.Packet3Chat.handle(SourceFile:49)
20.08 12:00:04 [Server] INFO at net.minecraft.server.v1_6_R2.PlayerConnection.a(PlayerConnection.java:839)
20.08 12:00:04 [Server] INFO at net.minecraft.server.v1_6_R2.PlayerConnection.chat(PlayerConnection.java:882)
20.08 12:00:04 [Server] INFO at net.minecraft.server.v1_6_R2.PlayerConnection.handleCommand(PlayerConnection.java:964)
20.08 12:00:04 [Server] INFO at org.bukkit.craftbukkit.v1_6_R2.CraftServer.dispatchCommand(CraftServer.java:523)
20.08 12:00:04 [Server] INFO at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:189)
20.08 12:00:04 [Server] INFO at org.bukkit.command.PluginCommand.execute(PluginCommand.java:44)
20.08 12:00:04 [Server] INFO at ru.tehkode.permissions.bukkit.PermissionsEx.onCommand(PermissionsEx.java:164)
20.08 12:00:04 [Server] INFO at ru.tehkode.permissions.PermissionManager.has(PermissionManager.java:69)
20.08 12:00:04 [Server] INFO at ru.tehkode.permissions.PermissionManager.has(PermissionManager.java:93)
20.08 12:00:04 [Server] INFO at ru.tehkode.permissions.PermissionManager.getUser(PermissionManager.java:116)
20.08 12:00:04 [Server] INFO at ru.tehkode.permissions.backends.FileBackend.getUser(FileBackend.java:111)
20.08 12:00:04 [Server] INFO at ru.tehkode.permissions.backends.file.FileUser.<init>(FileUser.java:39)
20.08 12:00:04 [Server] INFO at ru.tehkode.permissions.backends.file.FileEntity.<init>(FileEntity.java:42)
20.08 12:00:04 [Server] INFO at ru.tehkode.permissions.backends.file.FileEntity.getNode(FileEntity.java:48)
20.08 12:00:04 [Server] INFO java.lang.NullPointerException