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Fix Cloudflare 521 Error on Nginx: Step-by-Step Guide - How to Fix Chrome Status Access Violation on Windows 10-Stop Nginx Redirect Loop with These Checks

Updated 2026-07-28 14:08:51security-tools
Fix Cloudflare 521 Error on Nginx: Step-by-Step Guide - How to Fix Chrome Status Access Violation on Windows 10-Stop Nginx Redirect Loop with These Checks
Before changing system settings, save your work and note the exact error text so you can compare results after each step.

Extra verification checklist

  • Restart the affected app after changing permissions or configuration files.
  • Test the same workflow in a clean browser profile or a temporary user account.
  • Compare the result on another network if the error may be connection related.

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