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How to Fix Cloudflare Error 521: Origin Server Unreachable - Stop Nginx Redirect Loop in Server Block-How to Clear Firefox Cache to Fix Secure Connection Failed

2026-07-28 15:24:18
How to Fix Cloudflare Error 521: Origin Server Unreachable - Stop Nginx Redirect Loop in Server Block-How to Clear Firefox Cache to Fix Secure Connection Failed

Result check

  • Keep one change per test run so you know which step helped.
  • Undo temporary changes after the issue is confirmed.

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