Expose a "hello world" API doesn't work

Hi,
I’ve been following the tutorial trying to expose a very basic API, however, it didn’t work.
It shows the following log in debug mode:

Error loading web module backend/http-functions.js: Cannot find module 'backend/http-functions.js'
Require stack: 
- /user-code/stubmodule-that-does-the-require.js 
- /elementory/node_modules/scoped-require/index.js 
- /elementory/create-app.js 
- /elementory/cloud-grid-runner.js

My code is extremely simple and the site has been published. The URL I’ve used was in this format:

https://www.{my_domain}/_functions-dev/products

Please help! Much appreciated.

Hi Moyi,

Can you let me know if you are on a free or premium account?

Hi Jeff,

Thanks for your response. It is premium account.
I’ve given it a go again and it seems working fine now, with the same code and setup.