The server is running and answered this request, so the connection is
fine — only the path is missing. You are seeing this page because the
site publishes no 404.html of its own; the checks below
report what the server is actually sending.
This page ships inside Servette itself and runs on this site's own
domain — that is why it can read what it tests. Served by
Servette —
The Simple, Secure, Static-Site Server.