[18:30:23] [pool-13-thread-1/ERROR]: [PermissionsEx] Error occurred with PermissionsEx! Please post it to https://github.com/PEXPlugins/PermissionsEx/issues/new?title=&body=%23%23%23+Description+%23%23%23%0A%0A%5BInsert+description+of+issue+here%5D%0A%23%23%23+Detailed+Information+%23%23%23%0A%0A%5BIs+available+here%5D%28https%3A%2F%2Fgist.github.com%2F455c241e38779e055d8b%29%0A. Full error:
java.util.ConcurrentModificationException
	at java.util.LinkedHashMap$LinkedHashIterator.nextEntry(LinkedHashMap.java:370)
	at java.util.LinkedHashMap$EntryIterator.next(LinkedHashMap.java:389)
	at java.util.LinkedHashMap$EntryIterator.next(LinkedHashMap.java:388)
	at org.bukkit.configuration.MemorySection.mapChildrenValues(MemorySection.java:733)
	at org.bukkit.configuration.MemorySection.getValues(MemorySection.java:100)
	at ru.tehkode.permissions.backends.file.FileData.findExistingNode(FileData.java:44)
	at ru.tehkode.permissions.backends.file.FileData.findNode(FileData.java:60)
	at ru.tehkode.permissions.backends.file.FileData.<init>(FileData.java:23)
	at ru.tehkode.permissions.backends.file.FileBackend.getUserData(FileBackend.java:112)
	at ru.tehkode.permissions.PermissionManager.getUser(PermissionManager.java:295)
	at ru.tehkode.permissions.PermissionManager.getUser(PermissionManager.java:266)
	at ru.tehkode.permissions.bukkit.SuperpermsListener.updateAttachment(SuperpermsListener.java:52)
	at ru.tehkode.permissions.bukkit.SuperpermsListener.onPlayerLogin(SuperpermsListener.java:148)
	at sun.reflect.GeneratedMethodAccessor51.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
	at java.lang.reflect.Method.invoke(Unknown Source)
	at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:318)
	at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62)
	at org.bukkit.plugin.TimedRegisteredListener.callEvent(TimedRegisteredListener.java:47)
	at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:487)
	at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:472)
	at net.minecraft.server.v1_7_R1.PlayerList.attemptLogin(PlayerList.java:383)
	at net.minecraft.server.v1_7_R1.LoginListener.c(LoginListener.java:79)
	at net.minecraft.server.v1_7_R1.LoginListener.a(LoginListener.java:42)
	at net.minecraft.server.v1_7_R1.NetworkManager.a(NetworkManager.java:150)
	at net.minecraft.server.v1_7_R1.ServerConnection.c(ServerConnection.java:77)
	at net.minecraft.server.v1_7_R1.MinecraftServer.u(MinecraftServer.java:700)
	at net.minecraft.server.v1_7_R1.DedicatedServer.u(DedicatedServer.java:273)
	at net.minecraft.server.v1_7_R1.MinecraftServer.t(MinecraftServer.java:562)
	at net.minecraft.server.v1_7_R1.MinecraftServer.run(MinecraftServer.java:469)
	at net.minecraft.server.v1_7_R1.ThreadServerApplication.run(SourceFile:617)