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Fix OneDrive Sync 504 Gateway Timeout Error - How to Troubleshoot Firefox Not Responding with Safe Mode-Troubleshooting Cloudflare 1016 Origin DNS Error

2026-06-14 05:45:52macos-help
Fix OneDrive Sync 504 Gateway Timeout Error - How to Troubleshoot Firefox Not Responding with Safe Mode-Troubleshooting Cloudflare 1016 Origin DNS 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.