# Issue with Callback URL Mismatch

**URL:** <https://community.auth0.com/t/issue-with-callback-url-mismatch/120560>\
**Category:** Get Help\
**Tags:** login-experience, new-universal-login-experience\
**Created:** [November 9, 2023, 2:12pm UTC](https://community.auth0.com/t/issue-with-callback-url-mismatch/120560 "2023-11-09T14:12:58Z")\
**Posts on this page:** 1\
**Showing post:** 9

<div class="post-metadata">

**Author:** ![marcelina.barycka](https://sea1.discourse-cdn.com/auth0/user_avatar/community.auth0.com/marcelina.barycka/32/56162_2.png) [@marcelina.barycka](https://community.auth0.com/u/marcelina.barycka)\
**Post date:** [November 14, 2023, 3:43pm UTC](https://community.auth0.com/t/issue-with-callback-url-mismatch/120560/9 "2023-11-14T15:43:04Z")

</div>

Hi @german1 ,

I don’t think the issue is with the callback mismatch. A few members had a similar issue ad the reason were outdated packages. Here’s a [topic](https://community.auth0.com/t/nextjs-vercel-application-api-auth-callback-failing-despite-succeeding-locally/100233/2) for reference.

I am using the repo associated with this [doc](https://auth0.com/docs/quickstart/spa/react/01-login) for a Single Page App.  
For the URL you can use any specific single subdomain URL.

To test it, it’s enough to send an [/authorize](https://auth0.com/docs/api/authentication#database-ad-ldap-passive-) request (an example below) with a redirect\_uri param set to any specific single subdomain url (in the request neither in your app code do not use any wildcard; wildcard **only** in Auth0 tenant’s settings for a specific app like https://\*.google.com/domains/) to initiate the login flow and once authenticated, to be redirected to your page.

```auto
https://{your_auth0_domain}.com/authorize?client_id={xxx}&scope=openid+profile+email&redirect_uri={url}&response_type=code

```

Hope this helps!

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_[View the full topic](https://community.auth0.com/t/issue-with-callback-url-mismatch/120560)._