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Fix NET::ERR_CERT_AUTHORITY_INVALID in Chrome Safe Mode - Troubleshoot Chrome Extension Permission Errors-How to Fix Cloudflare 521 Error (Port 443 Blocked)

Updated 2026-07-28 12:00:05office-tools
Fix NET::ERR_CERT_AUTHORITY_INVALID in Chrome Safe Mode - Troubleshoot Chrome Extension Permission Errors-How to Fix Cloudflare 521 Error (Port 443 Blocked)
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.