We ran into this error on one of our laptops.
We noticed that it only occurred when attempting to load the device firmware. Clicking the “Configure” button worked successfully.
Setting a static IP address on the ethernet adapter in use seemed to resolve the problem.
Watching the log messages from the radio config utility. It appeared that the step to configure the adapter IP address was not performed when loading firmware, it just immediately tries to communicate with the bridge…
If you have a stock radio (FRC firmware not yet flashed, you’ll may need to set an IP Address in the access points default range; which according to google is likely 192.168.1.X. So something like 192.168.1.10 on your laptops adapter should work (documentation for this thing seems to be hard to come by these days - dead links on openmesh website - its almost like they are an EOL product or something)