MIDDLEWARE_INVOCATION_FAILED

The MIDDLEWARE_INVOCATION_FAILED error occurs when there is an issue with the Routing Middleware being invoked on the CDN. This error can be caused by a variety of issues, including unhandled exceptions.

500

MIDDLEWARE_INVOCATION_FAILED:

Internal Server Error

Troubleshoot

I'm encountering an error and reviewing the docs at /flg~eyJhbGciOiJIUzI1NiJ9._f7-_v4.UOF4sbL_iSEWy1pmGRdwrOZv9ecwg1vMZdA-QM_6bpc/docs/errors/MIDDLEWARE_INVOCATION_FAILED to understand what's happening. Please help me resolve this by: 1. **Suggest the fix**: Analyze my codebase context and propose what needs to be changed to resolve this error 2. **Explain the root cause**: Break down why this error occurred: - What was the code actually doing vs. what it needed to do? - What conditions triggered this specific error? - What misconception or oversight led to this? 3. **Teach the concept**: Help me understand the underlying principle: - Why does this error exist and what is it protecting me from? - What's the correct mental model for this concept? - How does this fit into the broader framework/language design? 4. **Show warning signs**: Help me recognize this pattern in the future: - What should I look out for that might cause this again? - Are there similar mistakes I might make in related scenarios? - What code smells or patterns indicate this issue? 5. **Discuss alternatives**: Explain if there are different valid approaches and their trade-offs My goal is to fix the immediate issue while building lasting understanding so I can avoid and resolve similar errors independently in the future.

To troubleshoot this error, follow these steps:

  1. Check application logs: Review the application logs to identify any specific errors related to the Routing Middleware being invoked. They can be found at the host URL under the /_logs path
  2. Use Vercel's status page: If you have tried the steps above and are still experiencing the error, check Vercel's status page for any reported outages in the CDN, which can sometimes cause this error
  3. Check function code: Ensure that the code for the Routing Middleware is correct and does not contain any errors or infinite loops

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