Hi Apple team, I'm integrating Sign in with Apple on my website https://roomieqindia.com using a custom Node.js backend, and I'm consistently receiving this error: invalid_client My configuration: ✅ Service ID: com.roomieq.auth ✅ Team ID: 75XVX5RXMQ ✅ Key ID: (from Apple-generated .p8 key) ✅ Private Key: (.p8 key pasted correctly in backend) ✅ App ID Selected: com.roomieq.roomieq ✅ Domain Added: roomieqindia.com ✅ Return URL: https://roomieqindia.com ✅ Clicked Done → Continue → Save after configuration Behavior: When I open this URL directly in browser: https://appleid.apple.com/auth/authorize?client_id=com.roomieq.auth&redirect_uri=https%3A%2F%2Froomieqindia.com&response_type=code%20id_token&scope=name%20email&response_mode=web_message&frame_id=ef13a755-75bb-4eef-8dd6-73bd75d6ede5&m=11&v=1.5.5 I get invalid_client. My backend uses apple-signin-auth Node.js package to: Generate the client secret (JWT) Exchange auth code for tokens Verify ID token Everything fails at step 1 because Apple doesn’t seem to recognize my Service ID as valid. What I Need: Can you please verify if: My Service ID ( com.roomieq.auth ) is fully active and recognized My App ID and Service ID are properly linked on Apple’s end There are any hidden issues with domain or return URL setup Let me know if I need to reset the Service ID or regenerate anything. Thanks in advance!