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Fix Git SSL Certificate Problem: Unable to Get Local Issuer on GitHub - Troubleshoot Cloudflare 521 for Wildcard Subdomains-Fix 'Port Already Used by Another Container' in Docker Compose

Updated 2026-07-28 02:39:53macos-help
Fix Git SSL Certificate Problem: Unable to Get Local Issuer on GitHub - Troubleshoot Cloudflare 521 for Wildcard Subdomains-Fix 'Port Already Used by Another Container' in Docker Compose
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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