---
title: INTERNAL_FUNCTION_INVOCATION_FAILED
product: vercel
url: /docs/errors/INTERNAL_FUNCTION_INVOCATION_FAILED
canonical_url: "https://vercel.com/docs/errors/INTERNAL_FUNCTION_INVOCATION_FAILED"
last_updated: 2026-02-09
type: reference
prerequisites:
  []
related:
  - /docs/deployments/build-features
summary: "The internal invocation of a function failed. This is Vercel's error."
install_vercel_plugin: npx plugins add vercel/vercel-plugin
---

# INTERNAL_FUNCTION_INVOCATION_FAILED

The `INTERNAL_FUNCTION_INVOCATION_FAILED` error occurs when a function invocation fails. This could be due to an error within the function itself, or an issue with the environment in which the function is running.

**Error Code:** `500`

**Name:** Internal Server Error

## Troubleshoot

To troubleshoot this error, follow these steps:

1. **Check application logs:** Review the application logs to identify any specific errors related to the internal function invocation. They can be found at the host URL under [the `/_logs` path](/docs/deployments/build-features#logs-view)
2. **Review function code:** Ensure that the code for the function is correct and does not contain any errors or infinite loops
3. **Verify function configuration:** Double-check the function configuration to ensure that it's set up correctly, including any environment variables or other settings
4. **Check external dependencies:** If the function relies on external services or APIs, ensure they are responding in a timely manner


---

[View full sitemap](/docs/sitemap)


If you encounter incorrect information, can’t find what you need, need a capability Vercel doesn’t currently offer, or have any other feedback to report, please do it by following the instructions at https://vercel.com/feedback.md.