Auth0Client is undefined

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Hi all,

This type of problem normally occurs because of a configuration error. We have a related FAQ item which may help here.

The auth0Client is undefined error normally occurs because the authorization server is returning an error result to you. Things to check:

  • Open the network tab in your browser’s developer tools, find the call to /authorize on https://<your tenant>.auth0.com and check the response. You may find that an HTML page is returned to you giving you hints about the problem
  • Open your Auth0 dashboard and inspect the logs. There may be something in there about a failed authorization call

We normally see this because of either the Allowed Callback URLs or Allowed Web Origin URLs are incorrect/haven’t been specified.

If the configuration for your client-side app matches that of your Auth0 application and there are no config errors, can someone please provide a small repro application that we can use to debug the issue?

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