Error accessing from polyfills-es2015

Steps: 1. Browse to

  1. Open browser console to view error.

Two errors can be viewed from Chrome Browser Console polyfills-es2015.js:1 GET 503 (Service Unavailable: Back-end server is at capacity) k @ polyfills-es2015.js:1

(index):1 Access to XMLHttpRequest at '' from origin '' has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present on the requested resource.

Posted issue on Github and got recommended to post here.