The redirect URI in the request, https://www.toontastic.net/board/applications/core/interface/google/auth.php, does not match the ones authorized for the OAuth client. To update the authorized redirect URIs, visit: https://console.developers.google.com/apis/credentials/oauthclient/399331595371-uj5fsd3tlivnh60lem6fnb7g9d131r7e.apps.googleusercontent.com?project=399331595371