Unable to Process Redirect Callback
Sep 10, 2025
Overview
When trying to configure the redirect from the Action and upon sending the user back to Auth0 (resuming the authentication flow), the following error occurs:
"Unable to process redirect callback. This is often caused by calling the /continue endpoint with an invalid state parameter."
Applies To
- Redirect Callback
- Action
Cause
- The user initiates the login flow using the default auth0 canonical domain, but when sending the user back to `/continue` endpoint using the custom domain (or vice-versa)
- The user spends more time on the page they are redirected to than allowed by tenant session configuration.
- The account that the user just logged in with is linked as a secondary identity before the call to /continue.
Solution
- Make sure that the flow uses the same domain.
- Make sure the session timeout is greater than the user spends on the redirected to page.