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Fixing Cloudflare 521 Error: Enable Origin Pull Setup - Resolve 522 Error with DNS-Only Mode in Cloudflare-How to Speed Up Cloudflare Wildcard DNS

Updated 2026-07-28 11:13:18office-tools

Fixing Cloudflare 521 Error: Enable Origin Pull Setup - Resolve 522 Error with DNS-Only Mode in Cloudflare-How to Speed Up Cloudflare Wildcard DNS

Likely symptom

Likely cause

Safe rollback

Verification route

Repeat the original action, not only a simplified test case.
Restart the app or reload the service after configuration changes.