The firmware was actually flashed as ZHA Multiprotocol - so I needed to install the Silicon Labs Multiprotocol addon first and then add the ZHA Multiprotocol integration, this allowed me to setup the Thread Border Router integration too.
I’m seeing this error for my UNRAID VM of HA, I’ve found no documentation other than that its supposed to be plug-and-play with Home assistant.
I see mention of some add-on. So If I install that add on everything works?