Fix for “Strapi: Warning: an error occurred while requesting the API”

server.js

/* Procedure
 * 
 * Update config/server.js with the code below
 * In your terminal run:
 * npm run build
 * then
 * npm run develop
 */
 

module.exports = ({ env }) => ({
  host: env('HOST', '127.0.0.1'),
  port: env.int('PORT', 1337),
  app: {
    keys: env.array('APP_KEYS'),
  },
});