#Access control allow origin' header install

No ‘Access-Control-Allow-Origin’ header is present on the requested resource.

If there are some context incorrect, feel free to point out. To be clarified, this is my solutions based on my assumptions that may not works perfectly in other case. My deployment works fine now, so I would like to share how I managed to solve these issues.

Jun 15 02:18:13 PM Server runs on port 10000Īny suggestions would be highly appreciated. Jun 15 02:18:03 PM => Starting service with 'npm run server' Jun 15 02:18:03 PM => Docs on specifying a Node version: Jun 15 02:18:03 PM => Using Node version 20.3.0 via /opt/render/project/src/package.json Jun 15 02:17:36 PM => Build uploaded in 8s Jun 15 02:17:26 PM success Saved lockfile. Jun 15 02:17:25 PM Building fresh packages. Jun 15 02:17:20 PM warning Workspaces can only be enabled in private projects. Jun 15 02:17:20 PM info is an optional dependency and failed compatibility check. Jun 15 02:17:20 PM info The platform 'linux' is incompatible with this module. Jun 15 02:16:56 PM Validating package.json. Jun 15 02:16:56 PM info No lockfile found.

#Access control allow origin' header install

My service logs: Jun 15 02:16:56 PM yarn install v1.22.5 Methods: 'GET,HEAD,PUT,PATCH,POST,DELETE',} Īccess to XMLHttpRequest has been blocked by CORS policy: No ‘Access-Control-Allow-Origin’ header is present on the requested ::ERR_FAILED 503 To fix the above error, I tried to revise it as below: const express = require('express') My original cors config in backend: const express = require('express')