ClaimLevels Automatic Payment not working

[10:38:26 INFO]: MannyTheDJ issued server command: /buy
[10:40:17 INFO]: Permission "essentials.sethome.6" added!
[10:40:17 INFO]: CONSOLE issued server command: /eco give 443ecdce-b87f-4f1e-a40
6-cc045357edad 75000
[10:40:17 INFO]: $75000 added to [Looter]MannyTheDJ account. New balance: $13934
5
[10:40:17 INFO]: Permission "essentials.clearinventory" added!
[10:40:17 INFO]: Permission "kingkits.kit.use" added!
[10:40:17 INFO]: Permission "kingkits.kits.epic" added!
[10:40:17 INFO]: Permission "kingkits.kit.list" added!
[10:40:17 INFO]: Permission "kingkits.command.killstreak" added!
[10:40:17 INFO]: CONSOLE issued server command: /sudo 443ecdce-b87f-4f1e-a406-cc
045357edad pvpkit demigod
[10:40:17 INFO]: Forcing [Looter]MannyTheDJ to run: /pvpkit demigod
[10:40:17 INFO]: CONSOLE issued server command: /broadcast Someone has just purc
hased the DemiGodPvPKit! &b/pvpkit demigod &cunlocked! &f do /buy to get your ow
n!
[10:40:17 INFO]: CONSOLE issued server command: /whisper 443ecdce-b87f-4f1e-a406
-cc045357edad Hey you! Thanks for your donation! &bWelcome to the family! &cDo /
pvpkit demigod to refill your kit :D
[10:40:17 INFO]: Error: Player not found.
[10:40:17 INFO]: CONSOLE issued server command: /give 443ecdce-b87f-4f1e-a406-cc
045357edad 38:4 1
[10:40:17 INFO]: Giving 1 of red rose to [Looter]MannyTheDJ.
[10:40:17 INFO]: 443ecdce-b87f-4f1e-a406-cc045357edad/MannyTheDJ's prefix has be
en set to "&8[&7Looter&8]&f"
[10:40:17 INFO]: Permission "mcmmo.perks.xp.250percentboost.all" added!
[10:40:17 INFO]: CONSOLE issued server command: /xp give 443ecdce-b87f-4f1e-a406
-cc045357edad 1500
[10:40:17 INFO]: Error: Player not found.
[10:40:17 INFO]: Permission "essentials.back" added!
[10:40:17 INFO]: Permission "essentials.heal" added!
[10:40:17 INFO]: Permission "essentials.invsee" added!
[10:40:17 INFO]: Error in command syntax. Check command help.
[10:40:17 INFO]: Permission "essentials.keepxp" added!
[10:40:17 INFO]: Permission "essentials.fly" added!
[10:40:28 WARN]: Exception in thread "Craft Scheduler Thread - 18"
[10:40:28 WARN]: org.apache.commons.lang.UnhandledException: Plugin ClaimLevels
v1.1 generated an exception while executing task 1912
        at org.bukkit.craftbukkit.v1_8_R2.scheduler.CraftAsyncTask.run(CraftAsyn
cTask.java:56)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
        at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.NoClassDefFoundError: org/bukkit/craftbukkit/libs/com/googl
e/gson/Gson
        at me.xCyanide.claimlevels.utils.UUIDLibrary.<clinit>(UUIDLibrary.java:2
8)
        at me.xCyanide.claimlevels.structure.PlayerManager$2.run(PlayerManager.j
ava:83)
        at org.bukkit.craftbukkit.v1_8_R2.scheduler.CraftTask.run(CraftTask.java
:71)
        at org.bukkit.craftbukkit.v1_8_R2.scheduler.CraftAsyncTask.run(CraftAsyn
cTask.java:53)
        ... 3 more
Caused by: java.lang.ClassNotFoundException: org.bukkit.craftbukkit.libs.com.goo
gle.gson.Gson
        at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.
java:91)
        at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.
java:86)
        at java.lang.ClassLoader.loadClass(Unknown Source)
        at java.lang.ClassLoader.loadClass(Unknown Source)
        ... 7 more


[10:42:06 INFO]: MannyTheDJ issued server command: /credits
>