Yesterday my application stopped receiving any data from our REST API. The endpoint had been returning clean JSON for months; now every call just hangs with no response—no status code, no error message, nothing. Here’s what I can share so far: • Endpoint URL, request headers, and sample payload that used to work. • Recent server-side change log (very small—only a config tweak). • Access to the codebase (Node.js + Express) and Postman collection for quick testing. What I need you to do: 1. Reproduce the “silent” failure locally or via Postman. 2. Trace whether the issue originates client-side, server-side, or at the network layer (firewall, SSL, CORS, etc.). 3. Implement a clean fix so the REST API reliably returns the expected JSON again. 4. Provide a concise summary of the root cause and the code/config changes applied. If you’ve debugged stalled REST endpoints before and can jump in right away, I’d love your help.