How Do I Fix "When loading the graph, the following node types were not found: CustomSigmas"?

[vivek-kumar-poddar]

Hi,

The UI based interface is working just fine. But as soon as I want to use the webUI --- mainly to use https://research.nvidia.com/labs/toronto-ai/AlignYourSteps/

I get this error:

When loading the graph, the following node types were not found: CustomSigmas 🔗 Nodes that have failed to load will show as red on the graph.

I have tried everything. Reinstalling everything and I mean everything. I have updated the ComfyUI with the latest version. But nothing seems to work.