CORS error only on prod

Our backend url seems to work fine everywhere.
We enables cors on the backend and it works using it locally,
But it only fails when use on our vercel prod app, get cors errors.

How do we resolve this?

Hi there,

Are you able to share with us the CORS errors you see?

You may want to open a ticket directly with us from our dashboard so can discuss any specifics not in a public forum.

It is a little strange that it works fine with the domain but not using your custom domain. Usually, it is the other way around.


Render Support, UTC+10 :australia:

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