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Fix Cloudflare Error 521 on Apache Server - How to Unlock BitLocker Files on Windows-Fix SSL Certificate Error in Command Prompt

Updated 2026-06-16 15:38:50developer-tools
Fix Cloudflare Error 521 on Apache Server - How to Unlock BitLocker Files on Windows-Fix SSL Certificate Error in Command Prompt
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.