404
what this HTTP status codes error means
How it shows up
HTTP/1.1 404 Not Found
What it means
The server cannot find the requested resource. A 404 does not say whether the resource is missing for now or for good.
The usual cause in an AI-built app
AI tools sometimes write fetch('/api/...') calls in apps that have no server of their own, such as a Vite single-page app from Lovable or Bolt, so the API route the code expects was never deployed.
Check this first
Copy the full URL of the failing request from the Network tab and check that this route or file actually exists in the deployed app.