I'm new to Amplify shader editor, Last week i've converted my hand written shader to new nodes (That was painful

I wanted to try to use the SRP with amplify, but I can't have it working.
I've followed the tutorial but it look like nothing is happening, I don't really know what to do next :/
I've tried to open the file HDSRPPBR

Once open in Amplify Shader Editor, I have the following message

And then it immediately turn pink

Alos in the meny "Create > Amplify Shader" I have nothing related to the SRP shaders
