NextJS - Intermittent invalid authorization code errors

Knowledge Solutions
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Problem Statement

Some of our users are encountering an invalid authorization code error after completing authentication in a NextJS application using the nextjs-auth0 SDK.

Troubleshooting

  • Check the dashboard logs to determine whether a duplicate exchange is being executed.
  • If a duplicate exchange is identified, investigate whether there is a double redirect to the callback in the browser.
  • If there is no double redirect, review the logic concerning the location of the code exchange.

Cause

  • This issue usually arises due to a double redirect, which leads to the code exchange being triggered twice.

Solution

Ensure that there is no occurrence of a double redirect (refer to troubleshooting steps). In case no redirect is present, verify that there is no redundant flow and that the callback is appropriately associated with the original request.