Essentials and PermissionsEX Not Working?

Hi,
I made my first Bukkit Minecraft server yesterday, and I wanted to add Essentials PermissionsEX, so I did.
Then it loads ok no problems... I do /spawn then it says Error 0 in red...

So I looked at my server console and it displayed this problem

[Essentials] Task #908 for Essentials v2.13.1 generated an exce
ption
java.lang.ArrayIndexOutOfBoundsException: 0
at com.earth2me.essentials.perm.PermissionsExHandler.getGroup(Permission
sExHandler.java:28) ~[?:?]
at com.earth2me.essentials.perm.PermissionsHandler.getGroup(PermissionsH
andler.java:40) ~[?:?]
at com.earth2me.essentials.User.getGroup(User.java:659) ~[?:?]
at com.earth2me.essentials.textreader.TextInput.<init>(TextInput.java:31
) ~[?:?]
at com.earth2me.essentials.EssentialsPlayerListener$2.run(EssentialsPlay
erListener.java:275) ~[?:?]
at org.bukkit.craftbukkit.v1_7_R3.scheduler.CraftTask.run(CraftTask.java
:53) ~[craftbukkit.jar:git-Bukkit-1.7.9-R0.1-10-g8688bd4-b3092jnks]
at org.bukkit.craftbukkit.v1_7_R3.scheduler.CraftScheduler.mainThreadHea
rtbeat(CraftScheduler.java:345) [craftbukkit.jar:git-Bukkit-1.7.9-R0.1-10-g8688b
d4-b3092jnks]
at net.minecraft.server.v1_7_R3.MinecraftServer.v(MinecraftServer.java:6
00) [craftbukkit.jar:git-Bukkit-1.7.9-R0.1-10-g8688bd4-b3092jnks]
at net.minecraft.server.v1_7_R3.DedicatedServer.v(DedicatedServer.java:2
60) [craftbukkit.jar:git-Bukkit-1.7.9-R0.1-10-g8688bd4-b3092jnks]
at net.minecraft.server.v1_7_R3.MinecraftServer.u(MinecraftServer.java:5
58) [craftbukkit.jar:git-Bukkit-1.7.9-R0.1-10-g8688bd4-b3092jnks]
at net.minecraft.server.v1_7_R3.MinecraftServer.run(MinecraftServer.java
:469) [craftbukkit.jar:git-Bukkit-1.7.9-R0.1-10-g8688bd4-b3092jnks]
at net.minecraft.server.v1_7_R3.ThreadServerApplication.run(SourceFile:6
28) [craftbukkit.jar:git-Bukkit-1.7.9-R0.1-10-g8688bd4-b3092jnks]
[19:50:44 INFO]: connorrulz123 issued server command: /spawn


What Do I do??? I need this fixed asap!!

 

One thing I did was delete PermissionsEx until I will make the server public.

 

PEX 1.22 API breakage issue, update essentials to prerelease and/or set a default group in your PEX file.

 

Thanks!! Worked perfectly... I already had my working pex setup so I just needed to get Essentials Pre-Release!