[Congdar]

It's likely that a Bot is triggering the EVENT_ATTACK and since a bot is not a client it fails. Try a quick test. Add a check in NPC::Damage() where EVENT_ATTACK is triggered

	if(attacked_timer.Check()) 
	{
		mlog(COMBAT__HITS, "Triggering EVENT_ATTACK due to attack by %s", other->GetName());

#ifdef BOTS
		if(other->IsBot())
			parse->EventNPC(EVENT_ATTACK, this, other->CastToBot()->GetBotOwner(), "", 0);
		else
#endif //BOTS

                parse->EventNPC(EVENT_ATTACK, this, other, "", 0);
	}