@Steve Gostling Thanks for reaching out.
As per the error the model was not found. Can you please navigate to your project setting and validate what the service resource you have specified and use the endpoint URL and account key for the same resource.
As per the screenshot I can see that you are using the right Model identifier name but please confirm if the connection string is for the same resource that you have configured as I was able to reproduce the issue if I use the incorrect endpoint/string for my model that I have created.
The other reason I could think about would be using a different version other than v3.0 as documented here as it specifically calls out v3.0 API and no other.