How to Clear DNS Cache to Fix ERR_NAME_NOT_RESOLVED - Fix PyCharm Virtual Environment Not Activating-Troubleshooting Cloudflare Wildcard SSL Issues

Updated 2026-07-28 22:53:23macos-help
How to Clear DNS Cache to Fix ERR_NAME_NOT_RESOLVED - Fix PyCharm Virtual Environment Not Activating-Troubleshooting Cloudflare Wildcard SSL Issues
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.