Your "backend" and "UBV2" services in the "ubv" project both show successful deployments and each has a public domain assigned. If your frontend is a client-side app (running in the browser), it must use the backend's public domain URL (e.g., https://backend-production-7f88.up.railway.app) to make requests, since browser-based requests cannot use the private network. Make sure the backend URL in your frontend code or environment variables points to the correct public Railway domain of your backend service.