One-time setup — fix the error you saw:
1. Go to
console.cloud.google.com/apis/credentials
2. Click your OAuth 2.0 Client ID
3. Under
Authorized JavaScript origins add:
https://portal.sasagroups.com
4. Under
Authorized redirect URIs add:
https://portal.sasagroups.com
5. Click
Save — wait ~2 min for changes to propagate
6. Paste your Client ID below and click Connect