TypeError: Post object detection

[MateaQ]

Hello,

I'm trying to make an object detection, using the node Tf-model, with my custom Tensorflow.js model. I was inspired by this tutorial:
https://developer.ibm.com/tutorials/building-a-machine-learning-node-for-node-red-using-tensorflowjs//#deploy-node-red-with-tensorflow-js-in-the-cloud

This is what it looks like:

Tf model gives me these results:

But I would like to get a nicer format: like ClassName, score. So I used post object detection node, but it throws me an error:

Post object detection node points to the classes of my model.

{ "0": "zakrivljene skare", "1": "Hvataljke", "2": "Skalpel", "3": "Ravne skare", "4": "Pinceta" }

Does anyone know how I could solve this problem? I would be very grateful.

Thanks in advance,
Matea