Rendering a notebook from a gist with Voila on

I’m attempting to render a notebook with Voila on from a GitHub gist and running into a problem. Following the directions in the Voila documentation, I believe I’m filling in the fields appropriately, as shown here:

Unfortunately when I launch the server, I’m ultimately getting this error message “Could not find path: voila/render/pydeck_demo.ipynb”

Can someone help me understand what I’m missing here? Thank you!!

try changing that dropdown to from File ▼ to URL