Stripe API/Secret Key Error

I followed the tutorial here, Stripe Custom Checkout Forms to create a Stripe checkout form.

I am receiving the following error:

“error”: "You did not provide an API key. You need to provide your API key in the Authorization header, using Bearer auth (e.g. ‘Authorization: Bearer YOUR_SECRET_KEY’). See https://stripe.com/docs/api#authentication for details, or we can help at https://support.stripe.com/."

I am using Nodejs locally. I have not uploaded the project anywhere as of yet.

Here is the screenshot of my App Structure.

Screenshot at May 08 13-46-56396×1766 163 KB

Here is the screenshot of my Server Action.

Screenshot at May 08 13-49-282512×1882 333 KB

Thank you in advance for your assistance.