[Support] Updates 5xx errors

[angelampcosta]

Summary

Updates 5xx errors with information about Speed Brain. Closes PCX-16970 and replicates #21679.

Documentation checklist

• The documentation style guide has been adhered to.

[hyperlint-ai]

Howdy and thanks for contributing to our repo. The Cloudflare team reviews new, external PRs within two (2) weeks. If it's been two weeks or longer without any movement, please tag the PR Assignees in a comment.

We review internal PRs within 1 week. If it's something urgent or has been sitting without a comment, start a thread in the Developer Docs space internally.

---

PR Change Summary

Updated documentation regarding 5xx errors to include information about Speed Brain and clarify error causes and resolutions.

• Clarified the causes of 5xx errors in the documentation.
• Added information about 503 errors only visible in logs and analytics related to Speed Brain.
• Included guidance on disabling Speed Brain for the zone.

Modified Files

• src/content/docs/support/troubleshooting/http-status-codes/cloudflare-5xx-errors.mdx

---

How can I customize these reviews?

Check out the Hyperlint AI Reviewer docs for more information on how to customize the review.

If you just want to ignore it on this PR, you can add the hyperlint-ignore label to the PR. Future changes won't trigger a Hyperlint review.

Note specifically for link checks, we only check the first 30 links in a file and we cache the results for several hours (for instance, if you just added a page, you might experience this). Our recommendation is to add hyperlint-ignore to the PR to ignore the link check for this PR.

[github-actions]

Preview URL: https://765e5df8.preview.developers.cloudflare.com
Preview Branch URL: https://angela-update-5xx-errors.preview.developers.cloudflare.com

Files with changes (up to 15)

Original Link	Updated Link
https://developers.cloudflare.com/support/troubleshooting/http-status-codes/cloudflare-5xx-errors/	https://angela-update-5xx-errors.preview.developers.cloudflare.com/support/troubleshooting/http-status-codes/cloudflare-5xx-errors/