Could not pass event EntityDamageByEntityEvent

Hi there, I'm having a trouble with my plugin. I get the error in title. Here's a log of from the server console: http://pastebin.com/RLa96GWK

Here's the code I wrote for the plugin: http://pastebin.com/EjBq9zZe

If anyone could give me some guidance for this I would really appreciate it, thanks very much.

 

Your issues are:

at com.icloud.justin.vitale.classes.assassin.AssassinVirulentPoison.onPlayerHit(AssassinVirulentPoison.java:47)

So the AssassinVirulentPoison class at line 47

and

at com.icloud.justin.vitale.classes.warrior.WarriorDesecratingStrike.onPlayerHit(WarriorDesecratingStrike.java:41) ~[?:?]

so the WarriorDesecratingStrike at line 41

both seems to be the PlayerHit event, so seeing the other class may help us as well.

 

You're casting before you have checked if theyre instanceof player.