Sigh.
This post is related to no route to host. Have you noticed that Firefox, or perhaps Brave, can’t browse to your OpenWRT router, or Proxmox instance? You get things like:
The problem is, once again, this:
In your macOS System Settings, find Privacy & Security, and go to the Local Network configuration. Find your browser, or any application mysteriously not able to communicate with your LAN devices, and enable it.
Sigh.