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Certbot Nginx Plugin Install Failures: Common Fixes - Windows 10: Port Already Allocated Error in Windows Defender Fix-Fix Windows Update 502 Bad Gateway Due to DNS Configuration

Updated 2026-06-13 15:16:42browser-issues
Certbot Nginx Plugin Install Failures: Common Fixes - Windows 10: Port Already Allocated Error in Windows Defender Fix-Fix Windows Update 502 Bad Gateway Due to DNS Configuration
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.

More repair notes

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