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# 404 “NOT_FOUND” on after python app deployment

54 views · 0 likes · 4 posts


Anton (@alvarez20-1850) · 2025-07-11

Hi,

This is my error code:
**404**: NOT_FOUNDCode: `NOT_FOUND`ID: `arn1::klvwr-1752237780908-7356655bf710`

This is my build log:
[15:50:17.484] Running build in Washington, D.C., USA (East) – iad1
[15:50:17.487] Build machine configuration: 2 cores, 8 GB
[15:50:17.516] Cloning github.com/userxp2000/codespaces-blank2 (Branch: main, Commit: c6e7aaa)
[15:50:18.211] Cloning completed: 695.000ms
[15:50:18.343] Restored build cache from previous deployment (h82zke5jPtLwqtULi34Z3xPe4iFe)
[15:50:18.555] Running "vercel build"
[15:50:19.053] Vercel CLI 44.3.0
[15:50:19.239] Build Completed in /vercel/output [14ms]
[15:50:19.258] Deploying outputs...
[15:50:20.365] 
[15:50:20.509] Deployment completed
[15:50:21.291] Uploading build cache [4.00 kB]...
[15:50:21.358] Build cache uploaded: 70.709ms
[15:50:23.578] Exiting build container

This is my vercel.json:

{
      "routes": [
        {
            "dest": "/api/$1.js",
            "src": "/api/(.*)"
        }
    ],
    "version": 2
}

Thanks in advance.


system (@system) · 2025-07-11

There's another community post with 404 debugging tips that might be helpful. Please give these solutions a try and let us know how it goes.

https://community.vercel.com/t/debugging-404-errors/437

A human should be around soon to offer more advice. But you can also get helpful information quickly by asking [v0](https://v0.dev/).


Jacob Paris (@jacobparis) · 2025-07-12

Are you having trouble reaching your python functions? I notice the vercel.json you show is mapping to JS files in the API, is that correct?

```ts
{
  "version": 2,
  "routes": [
    {
      "src": "/api/(.*)",
      "dest": "/api/$1.py"
    }
  ]
}
```

If you intend to have JS functions there and it's a Python web app, then the most common reason is a misconfigured Build Framework setting for the project. Have you chosen the correct framework?


system (@system) · 2026-01-20

Hi @alvarez20-1850! 🙂

We haven't heard back from you. If you're still stuck, feel free to share any updates, logs, or additional context that might help us assist you better!