---
title: INTERNAL_FUNCTION_NOT_FOUND
product: vercel
url: /docs/errors/INTERNAL_FUNCTION_NOT_FOUND
type: reference
prerequisites:
  []
related:
  []
summary: "The internal function could not be found. This is a Vercel's error."
install_vercel_plugin: npx plugins add vercel/vercel-plugin
---

# INTERNAL_FUNCTION_NOT_FOUND

The `INTERNAL_FUNCTION_NOT_FOUND` error occurs when an attempt to invoke a function fails because the function could not be found. This could happen if the function was not properly deployed, or if there is a misconfiguration in the function's settings or environment.

**Error Code:** `500`

**Name:** Internal Server Error

## Troubleshoot

To troubleshoot this error, follow these steps:

1. **Verify function deployment:** Ensure that the function has been successfully deployed and is available in the environment where it is being invoked
2. **Check function name:** Verify that the function name being used in the invocation matches the deployed function name
3. **Review configuration:** Check the function configuration in your project, including the function file name and the path where it is located
4. **Check for typos:** Ensure that there are no typos or incorrect references in the function name or in the invocation command


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