Problem/Bug PlayerInteractEntityEvent [No Stacktraces]

Code:

Inventory kits = Bukkit.createInventory(null, 54, "§6§lKit Selection");  
@EventHandler
    public void onEntityInteract(PlayerInteractAtEntityEvent e) {
        if (((e.getRightClicked() instanceof LivingEntity)) &&
                  (e.getRightClicked().getType() == EntityType.SKELETON))
                {
            LivingEntity l = (LivingEntity)e.getRightClicked();
            if (l.hasMetadata("kits")) {
                e.setCancelled(true);
                e.getPlayer().openInventory(this.kits);
                 kits.setItem(11,sold);
                 kits.setItem(12,as);
                 kits.setItem(13, ta);

               
                    }
                }
        }

I have debugged this and it goes through everything, the inventory never opens though.
There are no errors in console.

 

@InfiniteIV Did you register the listener?

 

Obviously.

I've been debugging this for an hour with someone else, this is really strange we've figured out the problem is the inventory itself it just never opens yet the server thinks it has opened it.