It looks like you do not have a network or at least HA can’t find it.
zwave:
usb_path: /dev/ttyACM0
network_key: !secret zwave_key
with the actual key in my secrets file.
See this thread to setup the key, if you don’t have one. https://community.home-assistant.io/t/aeotec-multisensor-6-problem/47418/4 or from the docs:
NETWORK KEY
Security Z-Wave devices require a network key before being added to the network using the Add Secure Node button in the Z-Wave Network Management card. You must set the network_key configuration variable to use a network key before adding these devices.
An easy script to generate a random key:
$ cat /dev/urandom | tr -dc '0-9A-F' | fold -w 32 | head -n 1 | sed -e 's/\(..\)/0x\1, /g' -e 's/, $//'
Example configuration.yaml entry for network_key
zwave:
network_key: "0x2e, 0xcc, 0xab, 0x1c, 0xa3, 0x7f, 0x0e, 0xb5, 0x70, 0x71, 0x2d, 0x98, 0x25, 0x43, 0xee, 0x0c"
Ensure you keep a backup of this key. If you have to rebuild your system and don’t have a backup of this key, you won’t be able to reconnect to any security devices. This may mean you have to do a factory reset on those devices, and your controller, before rebuilding your Z-Wave network.