My server keeps getting this error code, and I really don't wanna uninstall CommandsEX.

6:31:53 AM [SEVERE] Could not pass event PlayerDeathEvent to CommandsEX
org.bukkit.event.EventException
at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:304)
at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62)
at org.bukkit.plugin.TimedRegisteredListener.callEvent(TimedRegisteredListener.java:35)
at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:477)
at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:462)
at org.bukkit.craftbukkit.event.CraftEventFactory.callPlayerDeathEvent(CraftEventFactory.java:322)
at net.minecraft.server.EntityPlayer.die(EntityPlayer.java:170)
at net.minecraft.server.EntityLiving.damageEntity(EntityLiving.java:679)
at net.minecraft.server.EntityHuman.damageEntity(EntityHuman.java:595)
at net.minecraft.server.EntityPlayer.damageEntity(EntityPlayer.java:212)
at net.minecraft.server.EntityMonster.a(EntityMonster.java:80)
at net.minecraft.server.PathfinderGoalMeleeAttack.e(PathfinderGoalMeleeAttack.java:78)
at net.minecraft.server.PathfinderGoalSelector.a(PathfinderGoalSelector.java:74)
at net.minecraft.server.EntityLiving.z_(EntityLiving.java:1248)
at net.minecraft.server.EntityLiving.e(EntityLiving.java:1128)
at net.minecraft.server.EntityMonster.e(EntityMonster.java:21)
at net.minecraft.server.EntityZombie.e(EntityZombie.java:55)
at net.minecraft.server.EntityLiving.F_(EntityLiving.java:449)
at net.minecraft.server.EntityMonster.F_(EntityMonster.java:25)
at net.minecraft.server.World.tickEntity(World.java:1406)
at net.minecraft.server.World.entityJoinedWorld(World.java:1346)
at net.minecraft.server.WorldServer.entityJoinedWorld(WorldServer.java:106)
at net.minecraft.server.World.playerJoinedWorld(World.java:1338)
at net.minecraft.server.World.tickEntities(World.java:1231)
at net.minecraft.server.MinecraftServer.w(MinecraftServer.java:563)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:464)
at net.minecraft.server.ThreadServerApplication.run(SourceFile:492)
Caused by: java.lang.NullPointerException
at com.github.zathrus_writer.commandsex.handlers.Handler_deathgroup.passChat(Handler_deathgroup.java:91)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.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:302)
... 26 more