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Fix Cloudflare Error 521 on Apache Server - Fix 'Windows Not Genuine' Error After Update-Fix Chrome Debugging Port Already in Use Error

2026-06-14 03:14:17developer-tools
Fix Cloudflare Error 521 on Apache Server - Fix 'Windows Not Genuine' Error After Update-Fix Chrome Debugging Port Already in Use Error

Final checklist

  • Confirm that the same symptom is gone after a restart or refresh.
  • Keep the smallest working change and undo temporary diagnostic settings.