ComfyUI PPS UpscaleModelLoader, ImageUpscaleWithModel error?

[jayceftg]

If I ran the ComfyUI PPS script, and use an upscaling workflow, it gives an error:

When loading the graph, the following node types were not found: 

    ImageUpscaleWithModel
    UpscaleModelLoader

Nodes that have failed to load will show as red on the graph.

However, if I first use this file 'https://github.com/comfyanonymous/ComfyUI/blob/master/notebooks/comfyui_colab.ipynb', which uses Cloudflare, then I close the notebook, and use the ComfyUI PPS script, then there would be no problem using the same upscaling workflow.

Why? Also, ImageUpscaleWithModel, UpscaleModelLoader are in nodes_upscale_model.py, ComfyUI PPS is not using the file correctly or something?