Auth0 Error Occurs When Processing Redirect Callback

An Auth0 error occurs when processing a redirect callback due to an invalid state parameter, domain mismatch, session timeout, linked secondary identity, or missing Auth0 cookie. Resolve this by ensuring the authentication flow uses the same domain and verifying that the session timeout accommodates the time spent on the redirected page. When configuring the redirect from an Action and resuming the authentication flow, Auth0 generates the following error:

Unable to process redirect callback. This is often caused by calling the /continue endpoint with an invalid state parameter.

• Auth0
• Redirect Callback
• Action

The error occurs when calling the /continue endpoint with an invalid state parameter. Additionally, the error occurs under the following circumstances:

• The login flow initiates using the default Auth0 canonical domain, but the flow sends the user back to the /continue endpoint using the custom domain (or vice-versa).
• The user spends more time on the redirected page than allowed by the tenant session configuration.
• The account used for login links as a secondary identity before the call to the /continue endpoint.
• The Auth0 cookie is missing.

What steps resolve the redirect callback error?

Verify the domain configuration and adjust the session timeout settings to resolve the redirect callback error.

• Verify that the authentication flow uses the same domain.
• Verify that the session timeout is greater than the time the user spends on the redirected page.