---
url: /developers/misc/common-issues.md
---
# Common Issues

## Local pages return 404

Some pages that work on openlibrary.org return 404 in your local dev environment. This is expected — local instances only have a limited set of test data. See [issue #1864](https://github.com/internetarchive/openlibrary/issues/1864) for details.

## Finding endpoints and files for a component

If you need to find which handler or template serves a URL, the best approach is to search the codebase for the URL pattern.