Hello guys, Can someine help? I have a MERN application working perfectly locally. But I decided to deploy both the frontend (React vite app) and backend separately, on vercel. I am now facing issues due to the CORS (Cross-Origin-Resource-Sharing). When running testing the app, on the browser, I h…

As you can see, the CORS is still missing for the required website where you are trying to make the HTTP request. I would recommend checking the source code thoroughly, deploying without cache and make sure the URL is being set properly in build time.

[image] Evariste: In my index.ts , I configured the CORS as follows: app.use( cors({ origin: "https://connectcaju.vercel.app", credentials: false, }) ); The problem here is you are setting CORS header for one url connectcaju.vercel.app and trying to access it from different one. …

Thanks @Swarnava , I have added all the required environment variables to the vercel deployed project, include the frontend URL. app.use( cors({ origin: process.env.FRONTEND_URL, credentials: true, }) ); [img2] Unfortunately, I still have the same problem as shown in the image below …

CORS from issue from MERN app (deployed in vercel)

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CORS from issue from MERN app (deployed in vercel)

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