Faction's help

at java.lang.ClassLoader.loadClass(ClassLoader.java:356)
... 13 more
2013-10-21 10:41:29 [INFO] [EssentialsChat] Enabling EssentialsChat vPre2.11.1.11
2013-10-21 10:41:29 [INFO] [Factions] Enabling Factions v2.2.1
2013-10-21 10:41:29 [INFO] [0;36;22m[[0;36;1mFactions 2.2.1[0;36;22m] [0;33;1m=== ENABLE START ===[m
2013-10-21 10:41:29 [SEVERE] Error occurred while enabling Factions v2.2.1 (Is it up to date?)
com.massivecraft.mcore.xlib.gson.JsonSyntaxException: java.io.EOFException: End of input at line 267 column 37
at com.massivecraft.mcore.xlib.gson.Gson.fromJson(Gson.java:782)
at com.massivecraft.mcore.xlib.gson.Gson.fromJson(Gson.java:739)
at com.massivecraft.mcore.xlib.gson.Gson.fromJson(Gson.java:688)
at com.massivecraft.mcore.xlib.gson.Gson.fromJson(Gson.java:660)
at com.massivecraft.mcore.SimpleConfig.load(SimpleConfig.java:80)
at com.massivecraft.factions.Factions.onEnable(Factions.java:98)
at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:217)