invalid_request_error working with OpenAI API

I have been experimenting with Build a Backend using the OpenAI (GPT-3) API as outlined in this YouTube video:

https://www.youtube.com/watch?v=ehSnwEFh5Dc

I am running into a problem - when I use any of the OpenAI models in the playground and import those via curl into Xano, they run successfully. But when I use one of my own presets that I've built in the playground, I get this error:
result: {
error: {
message: you must provide a model parameter,
type: invalid_request_error,

Any ideas on how to resolve this error in Xano?