Problem #

You see one of the following errors while attempting to authenticate with WHMCS using Google® Sign-In Integrations:

Google Sign-In is unavailable at this time. Please try again later
Google Sign-In is unavailable at this time. Please try again later. Error: Not a valid origin for the client: http://example.com has not been whitelisted for client ID xxxxx

Cause #

Either the Authorized JavaScript Origins and Authorized redirect URIs settings in your Google app are no longer valid or Google did not access WHMCS from the correct URL.

Solution #

Check the Authorized JavaScript Origins and Authorized redirect URIs settings in Google. A valid URI must begin with https:// and use an active SSL certificate.

Last modified: 2025 April 2