Ballerina Composer Try-it requests 404 but OK from external cURL or Chrome

Question

I'm trying the Composer examples on the welcome page and when I run them, the request is 404 in the Try-it tab but if I use cURL from iTerm or a browser to the same URL, it works fine. I can run the same examples fine from VS Code as well.

Is there something I'm missing?

Thanks, Phil