Building a Learning Platform with Strapi CMS and Gridsome

Hi, I’m following this tutorial but i’m encountering an issue at the “The courses page” step.
As mentionned in the tutorial, after changing the gridsome.server.js file, I saved and tried to reload the server with gridsome develop but i got this error message :

Error: connect ECONNREFUSED 127.0.0.1:80
at TCPConnectWrap.afterConnect [as oncomplete] (net.js:1146:16)

I send a screenshot of my gridsome.server.js file

Do you have any tips ?