The redirect URI in the request, https://bywajtu.pl/complete/google-oauth2/, 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/329929274494-o3tooisf5929utom1r4elrlh4j8ps8cs.apps.googleusercontent.com?project=329929274494