---
title: INTERNAL_FUNCTION_NOT_READY
product: vercel
url: /docs/errors/INTERNAL_FUNCTION_NOT_READY
type: reference
prerequisites:
  []
related:
  []
summary: The internal function is not ready to be invoked. This is a Vercel error.
install_vercel_plugin: npx plugins add vercel/vercel-plugin
---

# INTERNAL_FUNCTION_NOT_READY

The `INTERNAL_FUNCTION_NOT_READY` error occurs when an attempt is made to invoke a function before it is ready to accept requests. This might happen if the function is still being deployed, initialized, or if there is a misconfiguration preventing the function from becoming ready.

**Error Code:** `500`

**Name:** Internal Server Error

## Troubleshoot

To troubleshoot this error, follow these steps:

1. **Verify deployment status:** Ensure that the function has been successfully deployed and the deployment process has completed
2. **Check initialization logs:** Review the function's initialization logs to identify any errors or warnings that might indicate why the function is not ready
3. **Review configuration:** Ensure that the function and environment configurations are correct and that there are no misconfigurations preventing the function from becoming ready
4. **Check dependencies:** Verify that all dependencies required by the function are available and correctly configured


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