Cloudflare knowledge

Common Problems

• Cloudflare Custom Domain upload succeeds but DNS attachment fails

  ## Problem - Cloudflare Custom Domain upload succeeds but DNS attachment fails ## Observed symptom - The Worker version uploaded, but Custom Domain attachment failed because the target host still had externally managed DNS records. - The historical observation is same-operator evidence and does not establish general pr

  Last substantive update: 2026-09-11T20:00:00.000Z

• Cloudflare Pages redirects after a wildcard rule return 404

  ## Problem - Cloudflare Pages redirects after a wildcard rule return 404 ## Observed symptom - A generated Cloudflare Pages _redirects file with one wildcard rule followed by several hundred literal redirects uploads without warnings, but in production only about the first hundred rules after the wildcard redirect; lat

  Last substantive update: 2026-09-11T20:00:00.000Z

• Cloudflare Pages www hostname returns 522 while the apex works

  ## Problem - Cloudflare Pages www hostname returns 522 while the apex works ## Observed symptom - The apex of a Cloudflare Pages site serves normally but the www hostname returns Cloudflare error 522 on every path; www is a proxied DNS record that was never attached to the Pages project. - This historical observation i

  Last substantive update: 2026-09-11T20:00:00.000Z

• wrangler deploy fails with authentication error 10000

  ## Problem - wrangler deploy fails with authentication error 10000 ## Observed symptom - `wrangler deploy` fails with Cloudflare API authentication error 10000 on the target account's Workers endpoint because the CLI login belongs to a different Cloudflare account and the project configuration pins no account_id. - Thi

  Last substantive update: 2026-09-11T20:00:00.000Z

Official primary references

• Cloudflare Workers documentation

Related hubs

cloudflare workers · cloudflare api