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Home / update-problems / How to Set Up a Wildcard Subdomain DNS Record in Cloudflare - Edge Sync Troubleshooting Guide: Fix Common Issues-Resolve NET::ERR_CERT_AUTHORITY_INVALID in Chrome Safe Mode

How to Set Up a Wildcard Subdomain DNS Record in Cloudflare - Edge Sync Troubleshooting Guide: Fix Common Issues-Resolve NET::ERR_CERT_AUTHORITY_INVALID in Chrome Safe Mode

Updated 2026-07-28 10:52:02update-problems
How to Set Up a Wildcard Subdomain DNS Record in Cloudflare - Edge Sync Troubleshooting Guide: Fix Common Issues-Resolve NET::ERR_CERT_AUTHORITY_INVALID in Chrome Safe Mode
Before changing system settings, save your work and note the exact error text so you can compare results after each step.

Extra verification checklist

  • Restart the affected app after changing permissions or configuration files.
  • Test the same workflow in a clean browser profile or a temporary user account.
  • Compare the result on another network if the error may be connection related.

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