Troubleshooting guides

Real errors and how to fix them. Every guide's code was run against the live ContextFetch API, and the page shows what it returned.

• Fix url_not_allowed (400) and fetch_failed (502) errorsWhy ContextFetch rejects some URLs with 400 url_not_allowed, why a fetch fails with 502 fetch_failed, and how to handle both in your code.Python