Fix 'Git Remote Origin Already Exists' Without Deleting - Why npm Says 'package.json Not Found' and How to Fix It-Troubleshooting Nginx -t 'No such file or directory'

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.