Client ID not found for env: sandbox

Hi, everyone!
Thank’s a lot for the tutorial, Bashir! Piece of art!

I’m following the “JavaScript Ec-ommerce” and I’m about to implement Paypal Payment and I got the error:

Uncaught Error: Client ID not found for env: sandbox

I’ve tried many times to connect with paypal (and of course rewrite the code again) but always the same error.

I’ve created my REST Api APP in sandbox with a sandbox business account (US) and copy my Client ID but with no success.

I apriaciate any help, thanks in advance.