While following this document (Auth0 Next.js SDK Quickstarts: Add Login to your Next.js application) to try to integrate Auth0 to my NextJS app, I get this problem:
Oops!, something went wrong
Callback URL mismatch.
The provided redirect_uri is not in the list of allowed callback URLs.
And when clicking: See details for this error
I see this:
unauthorized_client: Callback URL mismatch. https://nive-123abc…herokuapp.com/Channels_Pool/api/auth/callback is not in the list of allowed callback URLs
The strange thing is that though I know of Channels_Pool, this is not part of anything I have set up as a callback URLs or anything related to Auth0. So I do not understand why it mysteriously appear in this error and where it is coming from.
Also, what is this “provided redirect_uri” ? I am not aware of providing such a thing.
I am looking for an idea on how to tackle the problem.