11:03:16 AM [WARNING] Exception in thread "Craft Scheduler Thread - 16"
11:03:16 AM [WARNING] org.apache.commons.lang.UnhandledException: Plugin Skript v2.2-dev24 generated an exception while executing task 21
11:03:16 AM 	at org.bukkit.craftbukkit.v1_8_R1.scheduler.CraftAsyncTask.run(CraftAsyncTask.java:56)
11:03:16 AM 	at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
11:03:16 AM 	at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
11:03:16 AM 	at java.lang.Thread.run(Unknown Source)
11:03:16 AM Caused by: java.lang.NoClassDefFoundError: com/google/gson/Gson
11:03:16 AM 	at ch.njol.skript.Updater.deserialize(Updater.java:166)
11:03:16 AM 	at ch.njol.skript.Updater$CheckerTask.run(Updater.java:281)
11:03:16 AM 	at org.bukkit.craftbukkit.v1_8_R1.scheduler.CraftTask.run(CraftTask.java:71)
11:03:16 AM 	at org.bukkit.craftbukkit.v1_8_R1.scheduler.CraftAsyncTask.run(CraftAsyncTask.java:53)
11:03:16 AM 	... 3 more
11:03:16 AM Caused by: java.lang.ClassNotFoundException: com.google.gson.Gson
11:03:16 AM 	at java.net.URLClassLoader.findClass(Unknown Source)
11:03:16 AM 	at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:101)
11:03:16 AM 	at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:86)
11:03:16 AM 	at java.lang.ClassLoader.loadClass(Unknown Source)
11:03:16 AM 	at java.lang.ClassLoader.loadClass(Unknown Source)