Cloudflare 521 Error: Troubleshooting and Fixes - How to Fix npm ERR! enoent ENOENT: package.json Not Found-Windows Can't Access Shared Folder? Firewall Fix

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.