See the status code yourself
curl -sS -o /dev/null -w '%{http_code}\n' https://example.com/pathAdd -v to see the full request and response headers.
HTTP 521 Web Server Is Down (Cloudflare)
Cloudflare-specific: the origin refused the connection.
🔒 Runs locally — your input never leaves this browser tab
- Code
521- Name
- Web Server Is Down (Cloudflare)
- Category
- 5xx — Server error
How to fix / what to check
The web server is not running or the firewall is blocking Cloudflare IP ranges.