How to Clear DNS Cache to Fix ERR_NAME_NOT_RESOLVED - Dealing with pip's Externally Managed Environment-Fix Cloudflare Origin Certificate Rejection Using Let's Encrypt
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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