Executive summary
The private task page was reported as not loading shortly after Hiro's detached startup fix.
Server-side checks found Hiro healthy: all expected listeners are active, and the task page returns status 200 through both the loopback and private-network interfaces.
The private-network adapter retains its expected address, and Windows Firewall has an enabled inbound TCP allow rule for the Python runtime hosting Hiro.
The evidence points to the requesting device's private-network connection or browser protocol handling rather than a Hiro application or server-listener failure.