Client NRE on craft

Hello everyone!
I've recently made a new plugin - Quarry Craft for Rust | Oxide
But there is a problem.
Here is what I'm doing:

1. Creating the blueprint, that doesn't exists in game anymore
2. By the command createing a new craft entry with the new blueprint
3. Calling the hook
4. Enqueueing my custom task

So.... everything works like a charm with any blueprint, that exists in game, but with the non-existing one the client getting NRE
At the game code we can see this:

Code:

  public static int GetCraftCount(ItemBlueprint x)
  {
    int num1 = 0;
    if (LocalPlayer.CraftCounts.TryGetValue(x.targetItem.itemid, out num1))
      return num1;
    int num2 = PlayerPrefs.GetInt(string.Format("craftcount.{0}", (object) x.targetItem.shortname), 0);
    LocalPlayer.CraftCounts.Add(x.targetItem.itemid, num2);
    return num2;
  }  public static void AddCraftCount(ItemBlueprint x)
  {
    int num = LocalPlayer.GetCraftCount(x) + 1;
    LocalPlayer.CraftCounts[x.targetItem.itemid] = num;
    PlayerPrefs.SetInt(string.Format("craftcount.{0}", (object) x.targetItem.shortname), num);
  }

And I don't know how PlayerPerfs work at all. Is this a client-side thing? Cos I think that this is what causes NRE.
As I mention before - any over bp that exists doesn't create the NRE.